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Cavernous haemangiomas eventually regress and disappear spontaneously corpus gastritis definition discount reglan 10mg fast delivery, so intervention is required only if lesions persist beyond a few years of age. Cavernous haemangiomas may rarely be associated with thrombocytopenia and haemolytic anaemia secondary to trapping and destruction of platelets and erythrocytes within the lesions. Amoxicillin is the first-line antibiotic and can be given orally in mild-to-moderate infections. If the patient is allergic to penicillin, the first-line antibiotic of choice is clarithromycin, which can also be given orally. It tends to present with systemic illness in association with a well-demarcated area of raised erythematous skin that may be blistered. The first-line agents are benzylpenicillin and flucloxacillin, which cover streptococci and staphylococci, respectively. If the patient is fit enough for oral therapy, they are prescribed flucloxacillin and phenoxymethylpenicillin, since benzylpenicillin is available only as an intravenous preparation. Co-trimoxazole is a combination of trimethoprim and sulfamethoxazole that is often used as the first-line treatment. Co-trimoxazole is also used as a primary prophylactic agent in susceptible individuals. The majority of bacterial conjunctival infections clear up spontaneously, but antibiotics are often prescribed to reduce the course of the illness and the risk of complications. The main complication of chloramphenicol therapy is aplastic anaemia, but this is extremely unlikely to occur with topical treatment (although several cases have been reported in the literature). If the patient is seen in the community, a one-off dose of intramuscular benzylpenicillin can be given while transfer to a hospital is being arranged. A 14-year-old boy being treated for meningococcal meningitis begins to bruise easily and bleed from his central line site and peripheral cannula. A 15-month-old boy is brought to the emergency department with a grossly swollen right knee. His parents claim that he has had several episodes of bleeding into his joints and muscles over the previous 6 months. A 75-year-old man presents to the emergency department following a minor head injury. When his wife arrives, she mentions that he is on some medication for an irregular heart beat and has recently started a course of antibiotics for a chest infection. On examination, he has a number of spidery, red lesions on his lips, tongue and fingers. Troponin I In the following scenarios, we follow Mrs X through her chronic heart failure. For each scenario, select the most appropriate step in her investigation or management. She presents to the emergency department with a 3-month history of worsening shortness of breath associated with swollen ankles. What simple blood test could you do to effectively rule out heart failure in this patient The blood test that you performed on Mrs X suggests that she may have heart failure. Which class of drug is recommended as the first-line treatment of chronic heart failure and may help to remodel the left ventricle Which class of diuretic is used as a first-line symptomatic treatment when managing chronic heart failure Her current medications include enalapril, atenolol, zopiclone, aspirin and furosemide. A 41-year-old man presents with a 2-week history of bloody diarrhoea and lower limb weakness. On examination, there is bilateral weakness in the distal limbs, with absent deep tendon reflexes and diminished sensation. A 29-year-old woman presents to the emergency department with pain in her left ear. When she looked in the mirror, she noticed that the left side of her face was drooping. On examination, the left side of her face is weak and she is not able to smile or frown adequately. She demonstrates this by opening and closing her hand repeatedly and showing how the motion gets gradually slower. A 58-year-old man presents with a 2-month history of progressive weakness in his lower limbs, resulting in walking difficulties. On examination, his lower limbs are markedly wasted, although the reflexes are brisk. A 62-year-old man presents to the emergency department with weight loss, weakness and a cough productive of blood-stained sputum. The skin under her arms and on the back of her neck is dark and velvety in texture. There are multiple, light-brown, depressed lesions on her shins, each around 2 cm in size. She has recently started treatment for an overactive thyroid, but is otherwise well. She has recently started treatment for an underactive thyroid, but is otherwise well. A 34-year-old woman has been suffering from profuse diarrhoea and vomiting for 4 days. A 55-year-old man known to be in end-stage renal failure presents to the emergency department feeling generally unwell and experiencing palpitations. He admits to missing his last haemodialysis appointment as he went away on holiday. A 40-year-old woman presents with left-sided chest pain that is worse on breathing in. She is also experiencing shortness of breath on exertion and has coughed up a small amount of frank blood. An 85-year-old man with dementia is brought to the emergency department by ambulance after escaping from his care home during the night. He was found wandering the local moors by a farmer in the early hours of the morning. This serological marker is used to measure immunity following hepatitis B immunization. This serological marker would indicate chronic hepatitis B infection if detected 6 months after the original infection. This serological marker indicates high infectivity in a chronic hepatitis B carrier. This serological marker, if high, would indicate low infectivity in a chronic hepatitis B carrier. Cluster headache Coitus-induced headache Giant cell arteritis Ice-cream headache Idiopathic intracranial hypertension Meningitis Migraine Sagittal sinus thrombosis Sinusitis Space-occupying lesion K. Trigeminal neuralgia For each of the following scenarios, select the most appropriate cause of headache. A 32-year-old man presents to the emergency department with a sudden-onset severe occipital headache. She says that the pain is specifically on the left side at the front and is worse when touching the area. The headaches are accompanied by vomiting and she occasionally sees flashing lights in her visual field. Agranulocytosis Angina Bilateral recurrent laryngeal nerve injury Bronchoconstriction Hyperthyroid storm Hypocalcaemia Hypothyroidism Laryngeal oedema Malignancy J. Unilateral recurrent laryngeal nerve injury For each of the following scenarios, select the most appropriate complication.
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The posterior extent of the repair com monly encroaches on the perianal tissues gastritis yellow stool cheap reglan 10mg otc, and it is especially important to elicit a history and to conduct a physical examination of hemorrhoids or fissures. These may complicate the procedure and quite often produce additional pain that may exceed the peri neoplasty due to a thrombosed hemorrhoid or fis sure exacerbation. Make surgical resections taking previous incisions into consideration and incorpo rating them into the surgical plan. Parallel scars in the perineum may lead to an intervening area of poorly vascularized tissue. In the event of a violation of the rectal mucosa, thoroughly irrigate the wound and perform an imbricated and layered repair of the rectal mucosa making sure the edges are everted into the rectum. In the postoperative periods, this is very important because narcotic analgesics tend to be constipating. An enterotomy will typically heal uneventfully but, if a fistula develops, referral to a specialist is compulsory. Topical estrogen cream has been suggested for those with hormone deficiency or atrophy. Explain to patient that sym metry may not be achievable due to several factors including wound healing as well as other associated anatomic. Follow preoperative markings especially at the vaginal fourchette where the labia minora approximate each other. In most instances, chronic infections are rare and should be excluded and treated preoperatively. Accomplish meticulous hemostasis during the procedure especially in patients with hemorrhoids, as there are numerous dilated var icosities that may require ligation intraoperatively. Observation of the patient for a minimum of 15 min utes following conclusion of the procedure as well as cessation of the vasoconstrictor effects of epinephrine or other agents may be considered. Instruction in stool softeners and bowel laxatives as well as activity limitations to minimize increased venous congestion from straining and the Valsalva effects are recom mended. While bleeding is the primary concern, clotting and subsequent deep venous thrombosis also needs to be addressed when patients undergo general anesthetic. In this event, compression stock ings and sequential compression devices are used. Chemoprophylaxis is utilized only if its preoperative risk assessment warrants it. At the conclusion of the procedure vaginal packing may be utilized if temporary compression is desired. In persistent oozing a salinesoaked vag inal pack may be used overnight for tamponade but will require a Foley catheter, and hospitalization for observation may be considered with a voiding trial prior to discharge. Tight musculofascial plication will commonly result in spasm that will be painful and aggravated by defeca tion. The possibility of vaginal dilation exercises and the need for patient participation should be discussed preoperatively. Some authors claim that posterior colporrhaphy (performed for various reasons and not necessary for elective enhancement of sexual function) may have an incidence of dyspareunia ranging from 21% to 27% [34]. The size of the postsurgical introitus and degree of tightening may differ for patients whose partners are on the larger or smaller sides of the size spectrum. Whereas the lower vagina and perineal skin is supplied by the posterior labial branches of the pudendal nerve (S2, S3, and S4), the upper vagina is innervated by the splanchnic nerves (S2, S3, and occasionally S4) [13,35]. In addition to local infiltration, modified epidural catheters with pain pumps using agents such as 0. A variety of modalities such as external massage or ultrasound applied internally or externally may be employed. Refractory cases (not specifically related to vaginoplasty) have responded to botulinum toxin; the author has used this with good results in two patients [36]. Superficial wound dehiscence with any technique may produce an area of tissue attenuation and thinning that causes tenderness and hypersensi tivity and may recurrently tear with resumption of coitus. In rare instances, this has been associated with a recurrent subclinical herpes infection (detected only by biopsy) and concurrent treatment with antiviral therapy is also considered prior and subsequent to surgery. Urinary retention Retention is rarely encountered with solely posterior wall dissection but is not uncommon with anterior and upper vaginal dissection. The editor has found the administration of 1 mg lorazepam ~4 hours post operatively and at bedtime day of surgery to be help ful in reducing retention, especially in anxious patients (personal communication). Contour irregularities these are generally not a concern with regards to the vagina and relate primarily to the perineum and are dealt with in E2 above. Dissatisfied patients a How to avoid: Preoperative discussions relating to expectations are more important here than in nearly any other female genital procedure. Unlike other elective procedures, patients are seeking improved sexual function and are less likely to be concerned with appearance. Appearance concerns relate pri marily to the appearance of prolapsed hymenal frag ments or visibility of the introitus. Review of photographs of sample before and after photographs may help the physician understand patient expecta tions as well as giving the patient an understanding of anticipated outcomes. Dissatis faction will typically fall into one of two categories: too tight or too loose. In the instance it is too tight, vaginal dilators and stretching exercises will, in most instances, result in progressive relaxation and accommodation. Liberal use of lubricants may help to ease the sensations of tightness, and pelvic floor physical therapists may be extremely helpful. Perform revision surgery with myofascial release if acceptable goals or resection of permanent suture or materials were used. This can be extremely complex surgery and referral to a specialist should be consid ered. Surgery should be performed only if realistic goals can be established and accomplished. Prior to addressing concerns of too loose a repair, discuss the complications of further reduction with potential for sensations of undesirable tightness or traction or vaginismus especially with sexual activity. It is clear that there is a public perception (and many patients believe) that a tighter, smaller vagina will improve sexual function. The answer is more difficult and this must be relayed to the patient prior to undergoing surgery. This must be distinguished from a physically large vagina conser vatively measured as snugly admitting two fingers (highly variable). Therefore, some patients may interpret certain aspects of vaginal appearance and relate these to feelings of a large vagina. A patent introitus or visible hymenal frag ments are common complaints of women presenting 178 Female genital plastic and cosmetic surgery for surgery. An appreciation for agerelated changes as they relate to orgasm, satisfaction, and discomfort is important [37]. In one such study, where patients underwent combined vaginoplasty and perineo plasty, 38. Treatment of psychosexual issues, body image, and the rationale for a vaginal tightening procedure are addressed elsewhere. Consultation with sex therapists for management of dysfunction may provide an additional option. However, due to the avascular and thin tissues involved, the repairs are prone to breakdown.
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A 43-year-old woman with multiple sclerosis has started to get involuntary gastritis symptoms in dogs buy 10 mg reglan amex, violent tremors in her hands for no reason. These can come on at any time and are socially disabling, as they often result in dropping or spilling whatever she is holding. A 22-year-old man suddenly develops spasm in the right side of his neck, causing his head to turn to this side. Aciclovir Cholestyramine Endoscopic retrograde cholangiopancreatography Interferon- Intravenous antibiotics Liver transplantation Penicillamine Supportive care Ursodeoxycholic acid J. Venesection For each of the following scenarios, select the most appropriate management. A 32-year-old man has recently returned from holiday in India, where he stayed with locals and dined with them. Liver function tests reveal a massively raised alanine transaminase and a significantly raised bilirubin. A 47-year-old man presents with a 2-day history of feeling generally unwell and short of breath. A 38-year-old woman has a 2-month history of worsening shortness of breath and a dry cough. Azathioprine Chloroquine Diclofenac d-Penicillamine Gold Leflunomide Methotrexate Steroids Sulfasalazine For each of the following descriptions, select the most likely offending drug. Over the last few days, he has developed a yellow tinge to his skin and eyes, associated with pain in his right upper abdomen. He has gained a significant amount of weight in the last year, predominantly around his waist and on his face. Over the past 3 months, he has become progressively shorter of breath and now feels out of breath on minimal exertion. Tertiary hyperparathyroidism For each of the following scenarios, select the most appropriate diagnosis. A 7-year-old girl with chronic renal failure secondary to autosomal recessive polycystic kidney disease is found to have a corrected calcium of 1. A 37-year-old woman who underwent a thyroidectomy yesterday complains to the nurses that she has a tingling sensation around her lips and feels generally weak. A set of routine blood tests are requested, and show a normal full blood count, a normal renal function, a normal albumin and a corrected calcium of 1. A 74-year-old man with known small cell lung cancer is found to have a corrected calcium of 2. A 26-year-old woman with chronic renal failure secondary to renal dysplasia has a corrected calcium of 2. His only past medical history is two previous episodes of syncope while at the gym, but no cause was identified. On examination of his heart, the apex beat is displaced laterally and there is a pansystolic murmur that is difficult to identify since the heartbeat is irregularly irregular. A 64-year-old woman is referred for echocardiography following a history of weight loss, low-grade fever, nonspecific chest pain and palpitations. A 45-year-old man presents to the emergency department with central chest pain that is stabbing in nature and is exacerbated by lying down at night. A 46-year-old woman presents to the emergency department with a short history of worsening shortness of breath and a reduced exercise tolerance. She has been suffering with lethargy, muscle aches, fever and palpitations for 2 weeks. Abducens nerve palsy Oculomotor nerve palsy Optic chiasm lesion Optic nerve lesion Optic tract lesion Parietal lobe lesion Temporal lobe lesion Trochlear nerve palsy For each of the following scenarios, select the most likely visual defect. This morning, she noticed that she was occasionally getting double vision, which was most noticeable when she looked towards the left side. She has also noticed a gradual change in her appearance, citing growth in her chin, nose and hands. On examination, his right eye is looking downwards and laterally, and he is unable to move it from this position. Over the last few weeks, he has had near-misses on the motorway where he almost hit other vehicles when pulling into the fast lane. On examination, he is blind in the lateral half of his right eye and the medial half of his left eye. Over the last few days, when her pet parrot has flown down towards her from the right side, she has not noticed him. On examination, she is blind in the upper right quadrants of the visual field in both eyes. A 65-year-old woman with a history of dyspepsia and significant weight loss is noticed to have a 2-cm mass above her left clavicle. On examination, there are multiple, purple, tender, macular lesions on both shins. A 56-year-old woman who is being investigated for a gastrointestinal cause of irondeficiency anaemia is noticed to have fissures in each corner of her mouth. A 37-year-old woman with coeliac disease develops an intensely itchy blistering rash on her wrists and forearms. Vascular steal syndrome For each of the following scenarios, select the most appropriate complication. A 13-year-old girl who is receiving peritoneal dialysis for end-stage renal failure presents to the emergency department with abdominal pain and fever. A 45-year-old man who received a cadaveric renal transplant 3 months ago begins to complain of fever and pain around the transplanted kidney. Blood tests show a steady rise in serum urea and creatinine, despite the patient being appropriately hydrated. A 47-year-old man has been receiving haemodialysis for several years since he was diagnosed with adult polycystic disease. On examination, you note that the lesion is painless and firm and arises from an underlying scar. An 18-year-old man was cycling home without a helmet when he was knocked over by a car. On admission to the emergency department, the patient had a massive haematemesis and was booked for an urgent endoscopy. On the dorsal left foot there is a deep, sharply defined ulcer that the patient finds painful. A 23-year-old woman presents with a history of diarrhoea associated with the passage of blood and mucus. A 37-year-old woman attends her regular diabetes clinic with an ulcer on the sole of her right foot. The ulcer itself is deep and painless, and you find that she has sensory loss below the ankles bilaterally. The tape shows periods of sinus bradycardia followed by episodes of sinus tachycardia. A 55-year-old man is noticed to have a heart rate of 110 beats/min while on the highdependency unit following abdominal surgery. His other observations include blood pressure 146/92 mmHg, respiratory rate 14/min and oxygen saturations 99% on 2 L of oxygen via nasal cannulae. His epidural analgesia was stopped that morning, and he is complaining of abdominal pain with a severity of 8/10. A 75-year-old woman who suffers occasional episodes of palpitations presents to the emergency department with a painful left leg. A 55-year-old man is brought to the emergency department following a sudden collapse while gardening. A heart monitor shows a disorganized, broad, complex, irregular rhythm with a fluctuating baseline. A 36-year-old woman presents to the emergency department with chest pain and a sensation of feeling her heart pounding. A heart monitor is attached and shows a broad complex tachycardia with a rate of 210 beats/min on a variable axis. Tumour lysis syndrome For each of the following scenarios, select the most likely underlying problem. A 54-year-old woman with metastatic breast cancer presents to the emergency department feeling generally unwell and confused.
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In addition was the possibility of anastomoses between dendrites to form syncytial networks gastritis symptoms ie generic reglan 10mg line, particularly in the retina (cf. The theory provided a simple key for facilitating analysis of the cellular basis of nervous centers and pathways. That it concealed several critical levels of complexity in the organization of nerve cells would only be revealed by modern work. At the time of its appearance, it was regarded as an authoritative summary of what was known about the structure of nerve cells and nerve fibers. It gave clear expression to the point of view that all fibers arise directly from cells, and that a cell and its fibers form a unit, so that nervous transmission must take place from unit to unit. But the greatest influence of this review came from the new term "neuron" introduced for the unit. It was a quintessential example of the power of the word in science: a symbol for a new concept. Waldeyer forced his readers to judge not only the accumulated evidence for the varieties of nerve cells and their fibers as independent interacting units, but also whether the term "neuron" was acceptable, unambiguous, and useful in the light of this evidence. Out of this controversy, which lasted for about a decade until the turn of the century, was fashioned the consensus that came to be called the "neuron theory" or "neuron doctrine," and that has served as the central organizing concept of neuroscience to the present day. To cover all aspects of this debate, even for the limited period of the 1890s, would embrace most of the history of research on the nervous system during that time. We will keep our focus specifically on the issues most directly involved in the acceptance of the neuron doctrine. First was the problem of agreeing on the term "neuron," and on related terms for describing the varieties of nerve cells and their processes (this chapter). Second was how to incorporate into the concept of the neuron a new idea, of the "synapse" as the junction between neurons (Chapter 17). Third was the gradual refinement of the neuron concept in the light of the greatly expanded research on the cytological and cellular composition of the nervous system following 1891 (Chapters 17, 18). Opinions were expressed on every conceivable aspect, from its grammatical correctness to a variety of related terms and alternatives. We will sample the richness of this debate with citations from several of the key participants. There he trained in physiology under William Sharpey, who was also the teacher of Joseph Lister. His biographer comments on the status of this field in Great Britain at the time (Sherrington, 1935c): What was called "general anatomy" was then customarily, more than it is today, considered in this country a discipline belonging to physiology. This state of affairs was doubtless related, part as cause, part as effect, to the lack of equipment of the laboratories for pursuit of experimental physiology in the modern sense. In this respect our country was quite behind France, Germany and Italy and some other of its European neighbours. Schafer made an important experimental contribution to the study of the nerve cell in 1877 when he published his observations on the microscopic structure of the nerve plexus situated under the umbrella of the swimming bell of the jelly fish Medusa. Nervous activity in this plexus is responsible for the undulatory swimming motions of the bell. He suggested that fiber-to-fiber transmission could take place by some kind of electrical "inductive action," "the result being the same as if there were a real network" (Taylor, 1975). In 1876 (at the age of 26), he was one of 12 founding members of the Physiological Society. He was a Fellow of the Royal Society by 1878 and Jodrell Professor of Physiology at University College, London, in 1883. Schafer thus had reason to follow developments bearing on the structure and organization of nerve cells. But although this cell has been studied for a great number of years it is only now that we are beginning to arrive at a definite understanding regarding its structure, functions and relation to other nerve-cells. This has seemed to me therefore a suitable occasion for gathering up such threads of knowledge as we at present possess, and laying them before the members of this Society. I do not know why one should restrict the term "nerve-cell" to the body of the cell and thus exclude from that term the cell-processes. This is not done for any other kind of cell, and it appears to me that the custom which has hitherto prevailed with regard to nerve-cells in this matter is not only inadvisable but even misleading. Waldeyer [1891] has used the term "neuron" in this way to denote the whole nerve-cell, including all its processes. It is better, however, and simpler, to include under the term "cell", as is done with every cell of the body, the processes as well as the body of the cell. Every nerve-cell has one or more; it is an absolute characteristic of nerve-cells to possess processes. The first and the only essential kind is that which has long been known as the axis-cylinder or nerve-fibre process (Deiters). It is also the first kind to show itself in the course of development of the nerve-cell [His, 1889]. The other kind is that which was distinguished by Deiters as the protoplasmic process. The above terms have been long in use to indicate these two kinds of processes, but they are obviously inconvenient from their length and from the assumptions which they appear to imply. I propose therefore to term the axis-cylinder or nerve-fibre processes neurons; and the protoplasmic processes dendrons. And combined processes, such as occur in the motor nerve-cells of arthropods [Retzius, 1890] can conveniently be known as neurodendrons. It must clearly be understood however that all processes of nerve- cells are ultimately dendritic. Almost without exception the neuron or nerve-fibre process, although it may have a course of several feet without giving off a branch, finally ends in a terminal arborisation. There can be little doubt that this distinction into motor and sensory cells which was drawn by Golgi, can no longer be accepted. By the latter term is implied that the cell in question offers an intermediary link between centripetal impressions which may be brought to a nerve-centre by the neuron of a sensory projection-cell, and the centrifugal impressions which pass away from the nerve-centre by the neurons of motor projection-cells. In fact we may regard the basis of the grey matter of the nervous system-the granular-looking substance in which the nerve-cells are embedded-as an extremely fine interlacement of ramified processes, not only of the nerve-cells, which actually lie in that particular grey matter, but also of nerve-cells which lie in other parts of the nerve-centres or even in the peripheral parts of the nervous system, and which on arriving at the grey matter similarly break up into a fine arborescence of nerve-fibrils. Within this "Punktsubstanz" (dotted substance) it has long been known that many of the processes of the nerve-cells terminate, and it is now recognised by the employment of new methods, and particularly the method of Ehrlich, and the method of Golgi, that the Punktsubstanz is entirely made up of the finely ramified and somewhat varicose terminations, not only of the processes of the nerve-cells of the ganglia which constitute the central nervous system in these animals, but also of processes which arrive at those ganglia from nerve-cells at the periphery. In this it will be seen that the so-called Punktsubstanz is mainly made up of ramifications of fibres derived from the neuro-dendrons of the large motor nerve-cells. Retzius) Controversy 221 from the integument to the central nervous system may perfectly well become converted into motor impulses within the Punktsubstanz without necessarily traversing the motor nerve-cells at all; the latter being only connected with the Punktsubstanz by dendritic collaterals, which pass off from their large neuro-dendritic processes. Although it seemed to make sense to Schafer to call the axon a neuron, one can feel grateful that this suggestion died quietly! Apart from this, the paper is notable in giving support to the new ideas; also, the term "projection cell" came into general use to refer to long-axon cells. A curious aspect of this review is that Schafer does not cite his own earlier contribution to the subject (see also the discussion of this point in Chapter 6). Liddell (1960) notes that neither of these contributions is acknowledged by later workers. The explanation may lie in the fact that Schafer himself did not acknowledge them when he had the chance to do it. Or perhaps it was simply that his interests by then were leading him in other directions. Scarcely a year later (1894), he demonstrated for the first time the action of an extract of the adrenal gland in raising the blood pressure, and subsequently gave the name "endocrinology" to the new field he helped to found. He is representative of the microscopical anatomists who devoted their full attention to the study of the nervous system, and were establishing neuroanatomy as a separate discipline.
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An appropriate amount of skin must also be excised from the perineum and introitus to result in a cosmetically pleasing appearance of the opening of the vagina for the patient gastritis gerd order 10 mg reglan with visa. When a repair is primarily because of vaginal relaxation for sexual function it becomes a much more meticulous dissection and repair as the surgeon has to constantly judge and measure vaginal caliber to try to restore the entire vaginal length to its prechildbirth state. Vaginal packing is left in postoperatively and removed prior to the patient being discharged. Routine instructions for vaginal surgery are given to the patient and she is seen for followup at 4 weeks postoperatively or sooner as indicated. The vaginal introitus and caliber are assessed and if felt necessary the patient will begin perineal massage in a warm water bath for 1 to 2 weeks prior to resuming penetrative sexual intercourse. Conclusion Vaginal rejuvenation surgery is one of the latest trends in elective vaginal surgery for women. It is a restoration of the vaginal caliber in women who suffer from decreased vaginal sensation or feelings of a loose or wide vagina that affects their sexual life. In many instances, women who present with these symptoms are found to have other urogynecologic pathology such as prolapse that must also be addressed in any repair contemplated. Sexual dysfunction or decreased sexual sensation may be one of the first symptoms that women suffer from in the progression of prolapse and therefore a proper examination is vital prior to any repair. We have ample evidence, as presented in this chapter, that prolapse and vaginal relaxation can create sexual dysfunction and that repair may reverse these changes in many women. However, when dealing with sexual dysfunction alone and the caliber or width of the vagina, the surgical repair must be meticulous and precise in order to enhance sensation and function and not impair it. Many of the procedures are completed on an outpatient basis and the surgery is completed under local, spinal, or general anesthesia. Vaginal reconstruction and rejuvenation Surgery: Is there data to support improved sexual function The hidden epidemic of pelvic floor dysfunction: Achievable goals for improved prevention and treatment. Epidemiology of genital prolapse: Observations from the Oxford Family Planning Association Study. Postpartum sexual functioning and its relationship to perineal trauma: A retrospective cohort study of primiparous women. Elective primary cesarean delivery: Attitudes of urogynecology and maternalfetal medicine specialists. Report of the International Consensus Development Conference on female sexual dysfunction: Definitions and classifications. Sexual function in women with pelvic organ prolapse compared to women without pelvic organ prolapse. A new instrument to measure sexual function in women with urinary incontinence or pelvic organ prolapse. Experiences and expectations of women with urogenital prolapse: A quantitative and qualitative exploration. Does vaginal reconstructive surgery with or without vaginal hysterectomy or trachelectomy improve sexual well being Does sexual function change after surgery for stress urinary incontinence and/or pelvic organ prolapse Sexual function in women after urinary incontinence and/or pelvic organ prolapse surgery. Changes in sexual function and comparison of questionnaires following surgery for pelvic organ prolapse. Medium term changes in vaginal accommodation and sexual function after vaginal reconstructive surgery. Impact of laparoscopic sacrocolpopexy on symptoms, healthrelated quality of life and sexuality: A mediumterm analysis. Rectocele repair: A randomized trial of three surgical techniques including graft augmentation. Mode of delivery and pelvic floor muscle strength and sexual function after childbirth. World Congress on Female and Male Cosmetic Genital Surgery, 2011, Las Vegas, Nevada. ChApter 10 the biomechanics and physiology of clitoral and vaginally activated orgasm: impact of vaginal tightening operations Michael P. Alice Roosevelt Longworth It is well documented that pelvic relaxation adversely affects sexual function and that, when repaired, function improves [1]. The effect of childbirth on pelvic floor musculature and levator hiatal dimensions now has some evidence base [3]. In a previous chapter (Chapter 9), Moore, Miklos, and Chinthakanan reported that vaginal wall tightening operations are variations on classic pelvic floor perineorrhaphy + site-specific repair procedures modified specifically for improvement of sexual function by including a multilayered pelvic floor repair, reconstructing and elevating the perineal body, minimizing vaginal caliber, better approximating levator and transverse perineal musculature, and effecting an improved cosmetic introital, vestibular, and perineal appearance. Vaginal tone (thought to be due to a combination of anatomic proximity and muscular strength) affects vaginal sensation and ability to orgasm [4,5]. Investigators have shown that supervised pelvic floor muscle training can increase muscle volume, close the levator hiatus, shorten muscle length, and elevate the resting position of the bladder and rectum [6,7]. Anatomic relationships Understanding the biomechanics necessitates an understanding of the anatomic positioning of the vaginal canal and relationships of the clitoral complex and the nerverich anterior vaginal wall, which also contains the erectile tissue of the bulbs and crurae of the clitoris as it Female genital plastic and cosmetic surgery, First Edition. Understanding the physiology involved requires knowledge of the neurophysiology and probable differences in orgasmic potential of women. In many instances, the multiparous vagina loses this angle via pressure necrosis of muscle fibers from fetal head pressure and shearing/separating forces from the fetal presenting part as it slowly descends against and through the pelvic floor. The levator musculature becomes attenuated, the introitus gapes, the perineal body becomes lax and its size diminished, and the vaginal canal assumes a more horizontal angle. This has sexual consequences for many women, who complain of a "sensation of wide vagina" [a term coined by J. A "relaxed" vagina engenders less pressure in this area, while a toned vagina (or, conversely, a large penis) engenders greater sexual satisfaction. Orgasm (from the Greek lagnos lustful) is a cerebral event with local effects, including activation of sympathetic fibers via the hypogastric nerves and inferior hypogastric plexus to the uterovaginal plexus, accompanied by reflex waves of contraction of skeletal muscles of the vagina, urethra, and anus mediated by pudendal nerve, plus uterine smooth muscle contractions mediated by autonomic nerves [13]. Clitoral orgasm, from local/digital stimulation, and mediated through the clitoral nerve, a branch of the pudendal n. Awareness of vaginal and cervical stimulation is uniquely different from awareness of clitoral stimulation. Vaginal and cervical stimulation generate their own unique sensory input to the brain separate and distinct from clitoral sensory input and are adequate on their own to generate orgasm, a fact noted by Komisurak, Whipple, et al. These separate organs appear to act as an interrelated unit, with a shared blood supply and innervation, and respond as a unit during stimulation [12]. One might assume, then, that the tighter the vaginal barrel, the greater the force and greater the resultant stretch. Sexual desire is greater for women who have vaginal orgasm, and more frequent vaginal orgasm is associated with experiencing greater excitement from deep vaginal stimulation [5,23,24]. A history of vaginal orgasm is a protective factor against female arousal disorder [27]. A history of vaginal orgasm is a protective factor against global orgasmic dysfunction [28]. Women with greater intercourse orgasm constancy have better concordance of vaginal and subjective responses to erotica [29,30]. Women who have greater vaginal orgasm constancy have better attention to vaginal sensations during intercourse [21]. Women with a history of vaginal orgasm manifest less pelvic and vertebral functional muscular disturbance [31]. In women, stimulation of the clitoris, vagina, and cervix activated different regions of the brain, indicating that different genital regions produce different brain responses [18]. Women who have vaginal orgasm are more satisfied with their own sexual health [21,23]. When the vaginal caliber is repaired in a group of women presenting with decreased vaginal sensation or decreased friction, sexual function improves [37]. There is clear evidence in the medical literature that, in addition to the psychological improvement generated by what women feel is a cosmetic improvement to the appearance of the introitus, the biomechanical changes attendant with vaginal tightening procedures improve sexual pleasure and sexual health, are reproducible, and are secondary to the biomechanical tightening of the vaginal barrel produced by this surgery.
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It is doubtless that many of the fibers of the descending fringes gastritis diet buy reglan 10 mg free shipping, varicose and branching, are terminal arborizations, since they are constantly presented in the same way and with that aspect of discontinuous spheres characteristic of the nervous terminations; and, it is also certain, that almost all of the varicose and arciform expansions presented by the lateral filaments of the nervous prolongation of the large stellate cells show a terminal arborization (analogous to that exhibited by the trunk of the bipolar cells of the retina) in view of the fact that the procedure of Golgi never reveals a subsequent contination. Here must apply one of two hypotheses: either the procedure of Golgi is insufficient to show the bridges of union between these fibers with those of the white matter; or the connection between these and the axis cylinders can be mediated and can carry out the transmission of the nervous action in a manner like the electrical currents in an inductor coil. Comments on the Paper the first thing to note about this paper is that it is written in a modern format. It begins with an introduction that sets out clearly and succinctly the problem to be addressed. The methods are described in sufficient detail for a reader to repeat the experiments. The results then follow, organized in a logical framework according to different layers. There is a final discussion in which the author assesses how far the results have gone in resolving the questions posed in the introduction. We have left behind the personal and anecdotal styles of most of the earlier papers we have considered, as well as the wallowing in the Early Discoveries of Cajal 149 endless detail; here all efforts are focused objectively on an immediate problem. It is remarkable that Cajal, situated outside the mainstream of the science of his times, had this modern sense of how to write a scientific paper. He certainly would appear to deserve credit for helping to establish the modern format for scientific papers in neuroanatomy. The next point of interest is that this paper, concerned with connections between cells and the mode of termination of the lateral branches of axis cylinders, is not on the spinal cord. We have noted that in the previous tradition it was natural for medically trained researchers to study directly the human brain. However, the rise of embryology under von Baer was based largely on the chick embryo, where the different stages of development could be readily analyzed, and the work of His in the 1880s had continued the use of the chick for analyzing the development of the nervous system, as we have seen. Cajal was well aware of this, of course, and he may also have turned his boyhood fascination with birds to practical use as well. In any case, it became part of his professed strategy to take a comparative approach to the study of a given region; certain elements could be seen to better advantage in different species, and, as he stated (see above), this was crucial in identifying certain elements in the bird so that this knowledge could be used to unravel more complicated relations in humans and other species. The two illustrations in this paper give the clearest renderings in the literature up to that time of nerve cells and the full extension of their processes. As Cajal states in his section on methods, different variations on the histological procedures were best for visualizing different types of cells. In the illustrations, these different elements are arranged as Cajal conceived that they should be. These first illustrations are early versions of what was to become the beautifully realized forms and pathways that have provided later generations of neuroscientists with their basic visual images of the neuronal organization of the nervous system. New Findings and Interpretations the new observations by Cajal may be summarized as follows: 1. However, there is no emphasis on how elaborate this tree is, or the fact that it is flattened into a single plane. A new observation is that the branches are covered with small structures that he calls thorns or spines. This was the first report of dendritic spines, the smallest branches given off by a nerve cell. Cajal realizes that these might be artifacts, spurious deposits of silver, but believes that they represent normal structures. In fact, this issue was only resolved, like so many other questions, by the electron microscope in the 1950s. There is not a clear realization, however, that this is the main pathway out of the cerebellar cortex. Star-shaped cells scattered throughout the superficial (molecular) layer had been seen and repeatedly illustrated by Golgi. He had noted their protoplasmic prolongations (dendrites); he had also seen their axis cylinder coursing laterally, but had not been able to visualize their terminations. Cajal focuses on the cells nearest the Purkinje cell body layer and discovers that their axis cylinders give rise to two types of branches: some end freely within the molecular layer, but some descend and end as a special tuft of branchlets that surround the Purkinje cell body. Cajal called these descending fringes; they soon came to be called basket endings, and the cells giving rise to them a variety of stellate cell called basket cell. Why Golgi had not seen them is not clear; perhaps it required heavier impregnation with silver than he was willing to use. It happens that this is one of the most specialized types of terminal in the entire nervous system; furthermore, it is made by an entirely local nerve cell, a type not even conceived of by the classical anatomists, absorbed as they were in the large motor cells of the spinal cord. Golgi had assumed that these axis cylinders ramify and unite with the lateral branches of the the Early Discoveries of Cajal 151 axis cylinder of the Purkinje cells, contributing thereby to the nervous reticulum. Never mind that it arose from a practically unknown kind of cell; it was a clearly defined local terminal arborization, and it clearly made contact with the Purkinje cell without there being any anastomoses between the arborizations or between them and the Purkinje cell bodies. If there was one structure that persuaded Cajal of "contiguity without continuity," this was it. Golgi had described these cells-their small cell bodies and tiny protoplasmic prolongations with thickened terminations-but had not been able to visualize more than the stump of an axis cylinder. He likens the thickened terminations to the motor nerve endings at a neuromuscular junction, a quite misleading comparison between dendritic branches on the one hand and axonal branches on the other. As for the axis cylinder, he sees it ascend as far as the layer of Purkinje cell bodies but then loses it: he concludes, incorrectly, that these fibers never penetrate the molecular layer; discovery of the ascending axon that divides into the parallel fibers of the molecular layer is still to come. He is forced to conjecture that these fibers must connect to the Purkinje cells, perhaps with the lateral prolongations of their axis cylinders. This is as close as Cajal ever comes to admitting any possibility of fiber-to-fiber connection, and would not have been necessary if he had heeded his own advice and not let his imagination exceed the evidence. Cajal confirms the branching pattern of the protoplasmic prolongations (dendrites), as well as the profuse ramifications of the axis cylinder (axon). The latter defeat him: some "lose their individuality," thus leaving the possibility of entering a diffuse network; others seem to enter the white matter, which is not the case. Wisely, though, Cajal emphasizes that the methods were not yet adequate to the task. A new finding by Cajal was the fiber that enters from the white matter and branches and terminates in an enlargement called a nodule, thicket or mossy excrescence. The general concept Cajal offers is that "each element is an absolutely autonomous canton. One can only speculate that if he had used instead a word like "unit," the new doctrine, of the nerve cell as an independent unit, might have been born instantly. Interestingly, after this leap into the future, he has to remind himself that he cannot rule out indirect anastomoses through the enigmatic secondary filaments of Deiters. The Connections of the Nerve Fibers Even though terminal arborizations could be seen for some fibers, it still left many fibers inadequately visualized and with undetermined fates. Lending confusion to this problem was the traditional idea that the axis cylinder (axon) of a nerve cell was expected to enter the white matter. If, for example, the descending fringes end at the Purkinje cell bodies, how could their axis cylinders connect to the white matter This study supported his conclusion that there is no anastomosis between the nerve cells. Cajal later wrote that the retina was "the oldest and most persistent of [his] laboratory loves" (Cajal, 1989; quoted in Piccolino, 1988). The retina served him well in formulating his general laws (see later), but it also contained sources of misconceptions that have only been cleared up by modern work (Piccolino, 1988; see also below). The two other papers in that first issue of Revista reported observations on "Nervous terminations in the muscle spindles of the frog" and "Texture of the muscle fiber of the turtle," the latter a continuation of his earlier interest in muscle. The August issue of Revista contained three more papers, on the cerebellum and retina, and on the brain of the electric eel (Torpedo). The paper on the cerebellum was particularly concerned with the organization of the elements in the molecular layer. The second discovery was the climbing fiber, which enters from the white matter and climbs over the Purkinje cell body to branch and terminate over the Purkinje cell dendritic tree. Cajal (1989) later wrote: "This fortunate discovery, one of the most beautiful which fate vouchsafed to me in that fertile epoch, formed the final proof of the transmission of nerve impulses by contact. Now then, could not these very extensive and intimate connections be the means which nature provides to allow the nerve current to pass from one cell to the other; for example, from the stellate [basket] cells that have hitherto been considered sensory, to those of Purkyne which have been supposed to be motor
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Patients should be warned not to consume alcohol while taking metronidazole, as it inhibits the enzyme aldehyde dehydrogenase, resulting in facial flushing, tachycardia and vomiting on consumption of alcohol. Blockers inhibit the actions of catecholamines at the -adrenergic receptors within the heart, producing a negative inotropic and chronotropic effect. They also block peripheral 2-receptors in the vascular smooth muscle and bronchioles, causing peripheral vasodilatation and bronchoconstriction respectively. They may be safer in asthma compared with non-selective agents, but should still be avoided in patients with severe or brittle asthma. Alkaline phosphatase levels that are raised three times above the normal limit are strongly indicative of biliary tract disease. People with this condition have a mildly raised, non-haemolytic, unconjugated hyperbilirubinaemia, especially when they are acutely unwell. It commonly presents with a history of intermittent right upper quadrant pain that is exacerbated by fatty foods. Liver function tests in patients with uncomplicated biliary colic are often normal. If the common bile duct becomes occluded, conjugated bilirubin spills into the circulation and the damaged biliary canaliculi release alkaline phosphatase. It is an extremely sensitive marker of liver disease, but has very poor specificity, i. Alkaline phosphatase is an enzyme that is found in many tissues throughout the body (biliary tract, bone and placenta). The presence of significant hepatocellular disease can disrupt the liver parenchyma, causing obstruction of the biliary canaliculi and release of alkaline phosphatase into the circulation. An elevated alkaline phosphatase can therefore occur in biliary obstruction, hepatocellular disease and non-hepatic disease. Because unconjugated bilirubin is not water soluble, it does not enter the urine, and therefore causes acholuric jaundice (jaundice in association with normal coloured urine). The obstruction may be partially (but not completely) reversible with bronchodilators. Chronic bronchitis is defined as cough with sputum for most days of a 3-month period on two consecutive years. Emphysema is a pathological diagnosis of permanent destructive enlargement of the alveoli. The pathology includes hypertrophy of the goblet cells and decreased cilia with loss of alveoli elastic recoil. A chest X-ray shows hypertranslucent lung fields, a flat diaphragm, bullae and prominent hila. Management options include stopping smoking, antibiotics for infections, regular anticholinergics (ipratropium) and a salbutamol inhaler as required. Smoking cessation can be helped by bupropion, which is prescribed 2 weeks before stopping. Clinical features of spontaneous pneumothorax are suddenonset unilateral chest pain and dyspnoea. Examination findings include reduced chest wall movements, hyperresonance and reduced breath sounds on the affected side. Those with Marfan syndrome are at risk of developing recurrent spontaneous pneumothoraces. This man has a chest wound that is resulting in an open pneumothorax, as suggested by the respiratory distress, reduced breath sounds and hyperresonance to percussion. Management of an open pneumothorax is initially by occluding the wound with a sterile dressing and taping down three sides only. Because air can flow freely between the lungs and the pleura in the open pneumothorax, infection is common. A closed pneumothorax occurs when the communication between the lungs and pleura is closed. The pleural air reabsorbs spontaneously within a few days and infection is uncommon. A chest infection without chest X-ray changes is known as a lower respiratory tract infection. Community-acquired pneumonias are spread by droplet inhalation, and present with cough, fever and pleuritic chest pain. Examination reveals bronchial breath sounds in the affected area (due to consolidation) and coarse crepitations. The most common pathogens involved in community-acquired pneumonia are Streptococcus pneumoniae (30%), Mycoplasma pneumoniae, Staphylococcus aureus and Chlamydophila pneumoniae (previously known as Chlamydia pneumoniae). The resulting infection may be lobar pneumonia (homogeneous consolidation of one or more lobes) or bronchopneumonia (patchy alveolar consolidation that commonly affects both lower lobes). Empirical regimens include oral amoxicillin for uncomplicated cases and intravenous clarithromycin plus co-amoxiclav for severe disease. A repeat chest X-ray can be done after 6 weeks as an outpatient to confirm resolution (and rule out the presence of concomitant pathology, such as a lung tumour). Features include acute-onset pleuritic chest pain and shortness of breath, often with fever and tachycardia. The Westermark sign is a focus of oligaemia on X-ray distal to an occluded blood vessel. If a tension pneumothorax is suspected then management should be immediate, without ordering a chest X-ray. A large-bore cannula is inserted in the second intercostal space in the midclavicular line. This is later followed by formal chest drain insertion into the fourth/fifth intercostal space, mid-axillary line. Common features of cystitis include dysuria, frequency, hesitancy, suprapubic discomfort, fever, and the production of dark and offensive urine. A urine dipstick can be considered positive if it shows the presence of nitrites and leucocyte esterase.
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The distinction between protoplasmic [dendritic] and nervous [axonal] expansions is not diet in gastritis generic reglan 10mg on-line, therefore, fundamental, nor is it based on different physiological properties; nor is the presence or lack of myelin around the cellular processes, since on the one hand we see that the protoplasmic processes of the central nerve cells lack this sheath, on the other hand, we observe that the peripheral protoplasmic process [dendrite] of the dorsal root ganglion cells possesses [a myelin sheath] like the central process. And, finally, let us add that there are cells (the sympathetic cells) whose protoplasmic expansions have the function of axis cylinders, lacking always a medulated sheath. Proceeding from the simplest to the most differentiated, anatomically and dynamically, we shall expound the characteristics of the connections of the: 1), sympathetic cells; 2), bipolar cells; 3), multipolar cells with short cylinder [axon]; and 4), multipolar cells with long cylinder [axon]. As is well known, most authors consider the sympathetic cells of mammals to be multipolar, and are inclined to think that each expansion represents an axis cylinder or fiber of Remak. We have had occasion to study these cells, with the method of Golgi, in an extremely favorable region, the intestinal villi, and are inclined to think that all the cellular expansions have a protoplasmatic character. Like the latter, they are thick and have an uneven outline; they ramify at acute angles, losing their original orientation, and never appear to be enveloped by a myelin sheath. A portion of such prolongations anastomose with each other (perhaps reuniting or crossing their component protoplasmic filaments, but without a meeting of the same); and part of them, after repeated ramifications, terminate in fibrous cells or in the contiguous mucosal surface. In short: the sympathetic cells represent cells in which there exist no anatomical differences between protoplasmic [dendritic] and axis-cylinder [axon] expansions, both having the two roles of establishing internervous and extranervous connections. All of these are sensitive elements, be they of general sensitivity (dorsal root ganglion cells), or of special sensibility (peripheral ganglion cells, represented by the retina, nasal mucosa, etc. The dorsal root ganglion cells are bipolar cells in the fish, by contrast with mammals, birds, amphibians, etc. In any bipolar or ganglionic cell the thicker appendage or fiber is directed towards the periphery, therefore it could be considered as a protoplasmic [dendritic] branch, and this disposition is evident in the bipolar cells of the retina and olfactory mucosa; and the thinner and longer is directed towards the nervous centers where they end by free arborizations on the surface or on the expansions of central nervous cells. The final arborization of the cylinder [axon] is connected always with the first level or with the most immediate cellular formation of the centers; the Laws of Cajal 161 in this way, the bipolars of the retina send their axis cylinder [axons] to seek connections in the ganglionic layer which is its most proximate center; the olfactory bipolars are directed to the glomeruli of the olfactory bulb, which likewise represent the nearest protoplasmic outpost of the cells of this organ; and the medullary bipolars send theirs to the posterior bundle, where, after bifurcating into ascending and descending branches, it sends to the first cellular plane of the spinal cord (posterior horn) numerous free arborizations. An example of this interesting type of cell is found in the grey molecular layer of the cerebellar convolutions. There exists here a stellate cell, of small size, provided with numerous and divergent protoplasmic arborizations [dendrites], whose contours are rough, tooth-like, and with a thick, arciform axis cylinder, oriented transversally with relation to the length of the cerebellar convolutions. This axis cylinder [axon] does not go to the white matter, nor is it surrounded by myelin, but it exhausts itself by numerous descending small branches, which show the very singular particularity of forming, around the bodies of the Purkinje cells, nests of terminal varicose ramifications which, sometimes following for a certain interval the origin of the cylinder [axon] of these cells, end by a paintbrush. It is impossible, given this interesting connection, not to suppose that, by means of the terminal brushes, the stellate cells of the molecular layer transmit their action to the Purkinje cells. The protoplasmic branches [dendrites] probably establish connection between each other by numerous contacts and perhaps also by means of their rough bristles [spines] with the infinite longitudinal fibrils that make up the molecular layer, fibrils that we have demonstrated to originate in the axis cylinder of the granules. To this same type of cell of short axis cylinder, which does not extend beyond the limit of the grey region where it arises, are related also the granules of the granular zone of the cerebellum and many of the small cells of the posterior horns of the spinal cord the granules are dwarf corpuscles, spheroidal, which emit: various short protoplasmic expansions [dendrites], terminating in small and varicose arborizations, and an axis cylinder [axon], which is directed upward to the superficial or molecular layer, where, at different levels, it divides into two terminal branches of opposite direction (longitudinal fibrils). Since the granules are extremely numerous, the fibrils thus arising (that are perfectly parallel and oriented in the same direction as the cerebellar convolutions) are of such a large quantity that they literally fill all of the molecular layer of the cerebellum. The granule cells are probably connected between themselves by their protoplasmic branches, since we have often seen granule cell bodies tightly embraced by rings of terminal arborizations of neighboring congener elements. The large stellate cells of the granular zone are related also with these, by means of arborizations of their cylinder [axon], whose role seems to be to establish solidarity between a considerable number of elements, since the shortness of the protoplasmic [dendritic] arborization of the granule cells only allows them to be connected with the nearest cells. Other cells seem to behave in the same manner as the above; but we have not succeeded in carrying out studies sufficiently complete to permit establishing their paths of connection. For us there is no doubt that all of these protoplasmic branches have as their object, not conveying nutrient fluids to the cell body, as Golgi has said, but rather establishing contacts of transmission, either with protoplasmic [dendritic] arborizations of similar cells, or with nerve fibers of different origins. This function of taking currents from nerve fibers seems to us indubitable in two examples: 1, in the olfactory glomeruli (rounded granular masses which are arranged in rows around the bulb), the fibers of the olfactory nerve end by arborizations, and precisely in these parts, where, after overcoming great distances and obstacles, the thick protoplasmic [dendritic] shafts of the large pyramidal cells [mitral cells] and of the smaller elements located in the molecular layer [tufted cells] come to form their terminal arborization. Here the contact is exclusive, and it is made in a narrow area and, in order that the the Laws of Cajal 163 influence be more direct, Nature has enormously multiplied the ramifications or surfaces of engagement; 2, the other example we find in the Purkinje cells, whose protoplasmic [dendritic] arbor, transversally flattened, goes up to the cerebellar surface, placing each branchlet in intimate and almost exclusive contact with an infinite number of longitudinal fibers (axis cylinders [parallel fibers] of the granule cells). With less evidence although with some certainty, this connective function also appears in the ganglion cells of the retina and pyramidal cells of the cerebrum. In effect, in the retina and at the level of the internal reticular [inner plexiform] layer are arranged in contact: 1, the ascending protoplasmic arborizations [dendrites] of the ganglion cells; 2, the descending axis cylinders [axons] of the bipolar elements ramifying and terminating in tufts. In the cerebrum, notwithstanding that it has not been possible to establish connections very securely, because of our ignorance with respect to the major part of the fine fibers which plough through the grey cortex, one can conjecture it is the crown in which terminate the thick ascending protoplasmic expansion [apical dendrite], relating itself with the nerve fibers of the superficial layer; while the protoplasmic branches [dendrites], both lateral and descending, serve to make direct contacts with neighboring corpuscles. With regard to the axis cylinder [axon] of this type of cell, it is directed to the white matter, covered with myelin, and either leaves the nervous centers in order to arborize in muscles (motor fibers), or terminates in distant provinces of the same centers, in an unknown manner. Our studies show that in the white matter of the cerebellum, retina, spinal cord, one sees fibers emanating from the white matter and terminating in free arborizations among the nerve cells; but it has not been possible to determine if such arborizations proceed from the ganglion cells (the so-called sensitive-sensorial), or from the thick multipolar elements with very long cylinder [axon] which we have studied. From the point of view of the ramification of the nervous prolongation [axon], these cells present several variations. Certain cells exhibit a cylinder [axon] which only ramifies at the site of termination (anterior root cells of the spinal cord [i. There exist others whose cylinder bifurcates immediately, or emits a certain number of fibers of almost the same thickness, each one of which becomes enveloped in myelin and penetrates into the white matter. Finally, there is a much more numerous category of cell whose cylinder, without dichotomizing or losing its individuality, furnishes, near its origin, several collateral branches, of whose manner of termination we are ignorant, but which in general seem to be lost between the nerve cells, perhaps in search of making connections by contiguity. Such arrangements of the cylinder [axon] must involve some differentiating physiological properties; but this is in fact not easy to determine. Golgi has supposed that the cells whose axis cylinders conserve their individuality, despite their ramifications, have a motor character, and that those whose cylinder exhausts itself in ramifications possess a sensitive character. But, concerning the character of the exhaustion, it is not more than a question of the length of the cylinder (all cylinders ramify and lose their personalitiy [sic], but some do it near and others far from their origin); cells exist of evidently sensitive character, whose cylinder conserves its individuality up to its termination; such are, for example, those of the bipolar cells of the olfactory mucosa, the ganglionic cells of the retina and the large pyramidal cells [mitral cells] of the olfactory bulb, etc. As we see, the question of the physiological distinction of cells based on the histological data is more difficult than it seems, so that we ourselves will not venture some divisions of physiological character; and thus we consider that the length and manner of arborization of the cylinder [axon] have no relation to the direction and nature of the current that they must transmit, but with the distance at which are located the elements that must receive the nervous excitation and with the number and shape of these elements. Such is the summary of the investigations that we have been carrying out over the past three years in nearly every region of the nervous system. Certainly some of these opinions are anatomical hypotheses which will have to be further rectified or transformed; but even so, they are the only ones that are in harmony with the recently discovered facts, and we believe that, better than any others, they could serve Physiology in investigating the dynamic relationships of the nervous elements. The Laws of Cajal 165 13 Joining the Mainstream Despite the burst of discovery, the publications so painfully paid for and strategically posted to leading authorities in nervous system anatomy, there was little response. Combing the periodicals of 1889, Cajal was alarmed to find his work either ignored or dismissed "contemptuously. He realized that the authorities to whom he had sent his papers did not read Spanish, and that he would have to have key works translated into French (since he himself did not know German), and published in well-known German periodicals. He therefore applied for membership in the German Anatomical Society (Cajal, 1989), to which belonged anatomists, histologists, and embryologists of many nations, especially of the German confederation and of Austria-Hungary. During the sessions, the members discussed current anatomical problems; demonstrated, in support of their views, the gross and microscopic preparations which they had procured; explained the details of the methods used; in fine, pointed out to the lovers of investigation the fertile directions and the veins recently opened up for scientific exploitation. Finally, concurrently with the work of the congress, the manufacturers showed the recent developments in instruments for observation and experiment. The next meeting of the German Anatomical Society was to be at the University of Berlin in early October of 1889. Cajal, who had never travelled outside Spain except for the ill-fated voyage to Cuba, prepared carefully, saving the funds for the trip, arranging numerous visits with leading authorities along the way, assembling his best material, and taking along his own Zeiss microscope to present them. At the Congress, Cajal paid little attention to the talks, but devoted his efforts to setting up several microscopes provided for demonstrators, as well as his trusted Zeiss, to show his slides of the cerebellum, retina, and spinal cord, which, as we have seen, were the main focus of his work up till then. When the demonstration time began, Cajal, speaking in his broken French, attracted only a few skeptics. But once they began to examine the material, they realized that they were seeing nerve cells and fibers stained with a sharpness and clarity not seen before, what one would call a technical breakthrough. Thus, far from keeping to himself the secrets of his success, Cajal was eager to share them. It is interesting to speculate what might have happened if Golgi had followed the same course 15 years earlier, and had not only shared his secrets at such a Congress but had also had the benefit of their discussion of his interpretations. Cajal not only rejoiced in the acceptance of his results but was much gratified by the kindness shown to him personally by these imposing authorities who had until then seemed distant and forbidding. Through these meetings, Cajal obtained instant personal acquaintance with the main figures who were to share with him the final fashioning of the doctrines of the nerve cell. From Krause, Cajal learned of German academic life, and his reaction (recalled in Cajal, 1989) makes an interesting parallel to that of the American, Franklin Mall, cited earlier (Chapter 9). In our conversations at table we exchanged observations about the organization of our respective universities. It filled me with astonishment to learn that professors were chosen almost freely, without competitive examinations.
