› › The Pharyngoesophageal Sphincter

Motor Function of the Pharynx, Esophagus, and Its Sphincters

Author : Ravinder Mittal

Publisher : Morgan & Claypool Publishers

Page : 87 pages

File Size : 11,13 MB

Release : 2011

Category : Medical

ISBN : 1615043330

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Book Description

Deglutition or a swallow begins as a voluntary act in the oral cavity but proceeds autonomously in the pharynx and esophagus. Bilateral sequenced activation and inhibition of more than 25 pairs of muscles of mouth, pharynx, larynx, and esophagus is required during a swallow. A single swallow elicits peristalsis in the pharynx and esophagus along with relaxation of upper and lower esophageal sphincters. Multiple swallows, at closely spaced time intervals, demonstrate deglutitive inhibition; sphincters remain relaxed during the entire period, but only the last swallow elicits peristalsis. Laryngeal inlet closure or airway protection is very important during swallow. Upper part of the esophagus that includes upper esophageal sphincter is composed of skeletal muscles, middle esophagus is composed of a mixture of skeletal and smooth muscles, and lower esophagus, including lower esophageal sphincter, is composed of smooth muscles. Peristalsis progresses in seamless fashion, despite separate control mechanism, from the skeletal to smooth muscle esophagus. The esophagus's circular and longitudinal muscle layers contract synchronously during peristalsis. Sphincters maintain continuous tone; neuromuscular mechanisms for tonic closure in the upper and lower esophageal sphincters are different. Lower esophageal sphincter transient relaxation, belching mechanism, regurgitation, vomiting, and reflux are mediated via the brain stem. Table of Contents: Introduction / Central Program Generator and Brain Stem / Pharynx-Anatomy, Neural Innervation, and Motor Pattern / Upper Esophageal Sphincter / Neuromuscular Anatomy of Esophagus and Lower Esophageal Sphincter / Extrinsic Innervation: Parasympathetic and Sympathetic / Interstitial Cells of Cajal / Recording Techniques / Motor Patterns of the Esophagus-Aboral and Oral Transport / Deglutitive Inhibition and Muscle Refractoriness / Peristalsis in the Circular and Longitudinal Muscles of the Esophagus / Neural and Myogenic Mechanism of Peristalsis / Central Mechanism of Peristalsis-Cortical and Brain Stem Control / Peripheral Mechanisms of Peristalsis / Central Versus Peripheral Mechanism of Deglutitive Inhibition / Neural Control of Longitudinal Muscle Contraction / Modulation of Primary and Secondary Peristalsis / Neural Control of Lower Esophageal Sphincter and Crural Diaphragm / Lower Esophageal Sphincter / Swallow-Induced LES Relaxation / Crural Diaphragm Contribution to EGJ and Neural Control / Transient LES Relaxation and Pharmacological Inhibition / Compliance of the EGJ / References





Principles of Deglutition

Author : Reza Shaker

Publisher : Springer Science & Business Media

Page : 994 pages

File Size : 14,93 MB

Release : 2012-09-20

Category : Medical

ISBN : 1461437938

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Book Description

Principles of Deglutition is the first in class comprehensive multidisciplinary textbook to encompass the entire field of normal and disordered deglutition. It is designed as the definitive text for all those who desire to further their knowledge of the dynamic and expanding field of deglutology. The text is created to serve as a treasured reference for clinicians, educators and trainees from such diverse backgrounds as gastroenterology, speech language pathology, otolaryngology, rehabilitation medicine, radiology and others. Principles of Deglutition brings together the state-of-knowledge from 12 disciplines involved in dysphagia through contributions of over one hundred thought leaders and master clinicians for the benefit of patients and providers alike. It concisely organizes the wealth of knowledge that exists in each of the contributing disciplines into one comprehensive information platform. Principles of Deglutition provides a one-stop destination for members of all specialties to obtain state-of-the-art and critically reviewed information regarding deglutition physiology, pathophysiology, diagnosis and management. It delivers a comprehensive and in depth review of deglutition related cerebral cortical, brainstem, peripheral nerves, and neuromuscular mechanisms, advanced diagnostic modalities and standard of care and cutting edge medical, rehabilitative and surgical treatments. It is an essential reference for all deglutologists.



The Esophagus

Author : Joel E. Richter

Publisher : John Wiley & Sons

Page : 73 pages

File Size : 16,47 MB

Release : 2021-07-13

Category : Medical

ISBN : 1119599601

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Book Description

THE ESOPHAGUS The Esophagus investigates the anatomy, physiology, and pathology of the esophagus. This sixth edition, revised and updated throughout, also explores the diagnosis and treatment of various esophageal conditions. It includes treatment guidelines approved by the two largest gastroenterology societies, the ACG and AGA, as befits a work co-edited by two former presidents of those organizations. Advancements in diagnostics are presented, as are developments in the surgical and drug therapies. Presented in full colour, and boasting an unrivalled team of editors and contributing authors, The Esophagus Sixth Edition will find a home wherever the anatomy, physiology, and pathology of the esophagus are studied and taught. This book is accompanied by a website containing all the figures from the book in PowerPoint format. www.wiley.com/go/richter/esophagus6e Praise for the Fifth Edition: “There is absolutely no doubt that this edition of the textbook will maintain its status as the go-to reference for esophageal conditions, and will remain a highly utilized and clinically useful resource for novice and experienced physicians and surgeons alike.” (Gastroenterology, 1 July 2013)



CURRENT Diagnosis and Treatment Surgery: Thirteenth Edition

Author : Gerard Doherty

Publisher : McGraw Hill Professional

Page : 1328 pages

File Size : 19,24 MB

Release : 2009-08-20

Category : Medical

ISBN : 0071635157

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Book Description

To-the-point information on more than 1000 diseases and disorders surgeons are most likely to encounter The leading single-source surgery book for house-staff, students, practitioners, and surgeons A Doody's Core Title for 2011! "This is an excellent source of updated, authoritative, and concise information on diseases encountered in general surgery and the surgical subspecialties of otolaryngology, urology, gynecology, orthopedics, plastic and reconstructive surgery, and pediatrics....This is a wonderful resource for all levels of surgical practitioners as well as nonsurgical practitioners. In my experience, it has provided me with a framework to prepare for both oral and written boards. 3 Stars."--Doody's Review Service Authoritative, concise, and completely up-to-date, CURRENT Diagnosis & Treatment Surgery features: Wide-ranging coverage that encompasses general surgery and all the important subspecialties including otolaryngology, urology, gynecology, orthopedics, plastic and reconstructive surgery, and pediatrics References linked to recent journal articles Logical quick-find organization made even more accessible by a comprehensive index More than 600 informative photographs and illustrations Detailed treatment algorithms NEW CD-ROM with content from Quick Answers: Surgery to speed diagnosis of symptoms and signs NEW Chapter on Training, Communication, Professionalism, and Systems-Based Practice Completely rewritten chapters on Wound Healing, Anesthesia, Otolaryngology/Head & Neck Surgery, The Heart, Neurosurgery, Gynecology, and Orthopedics



Dysphagia Management in Head and Neck Cancers

Author : Krishnakumar Thankappan

Publisher :

Page : pages

File Size : 17,98 MB

Release : 2018

Category : HEALTH & FITNESS

ISBN : 9789811082832

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Book Description

Dysphagia and problems related to swallowing are common following treatment for head and neck cancers. Though there are books available on dysphagia management and associated neurological conditions, this is the only atlas that comprehensively discusses dysphagia related to the head and neck cancers. It comprises of 33 chapters divided into five sections. The initial chapters present the anatomy and physiology of swallowing and the pathophysiology of the dysphagia-related structures. It discusses assessment of dysphagia in detail, highlighting clinical and instrumental evaluations. Swallowing dysfunction related to common sub-site cancers and chemo-radiotherapy related dysphagia are explored individually. The book addresses direct and indirect swallowing therapy methods involving postures and exercises in a detailed yet simple manner to enable them to be incorporated in routine practice. It also covers topics like nutritional management, alternative feeding methods and unique problems associated with tracheostomy that have a great bearing on the day-to-day management of patients with dysphagia. The current status of the research and evidence- based management updates are also included. Additionally, where appropriate videos are included for a better understanding of the subject. Written and edited by experts in the field, the book is intended for clinicians treating head and neck cancer, head and neck surgeons, radiation oncologists, speech and swallowing therapy specialists and trainees in these fields.



Laparoscopic Sleeve Gastrectomy

Author : Salman Al-Sabah

Publisher : Springer Nature

Page : 674 pages

File Size : 46,19 MB

Release : 2021-01-04

Category : Medical

ISBN : 3030573737

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Book Description

This book provides a complete guide to laparoscopic sleeve gastrectomy and the management of obesity. The chapters discuss guidelines for healthcare providers for the management of patients with obesity, the rationale behind choosing patients, performing the procedure in line with the patient’s condition, the perioperative period, postoperative requirements, and postoperative complications. This book aims to give readers an understanding of the surgical techniques involved in laparoscopic sleeve gastrectomy and the wider treatment options available. It is relevant to bariatric, metabolic, and general surgeons, physicians, clinical nutritionists as well as students.



The Clinician's Guide to Swallowing Fluoroscopy

Author : Peter C. Belafsky

Publisher : Springer

Page : 126 pages

File Size : 26,74 MB

Release : 2014-08-05

Category : Medical

ISBN : 1493911090

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Book Description

The Clinician’s Guide to Swallowing Fluoroscopy is a comprehensive resource for all dysphagia clinicians. This beautifully-illustrated text is intended for SLP, ENT, radiology, GI, and rehabilitation specialists interested in swallowing and addresses the need for an up-to-date, all-inclusive reference. Topics covered include radiation safety and protection, fluoroscopic oral, pharygeal, and esophageal phase protocols and abnormalities, and objective measures of timing and displacement.



Atlas of Pediatric Surgery

Author : Ahmed H. Al-Salem

Publisher : Springer Nature

Page : 896 pages

File Size : 34,71 MB

Release : 2020-01-02

Category : Medical

ISBN : 3030292118

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Book Description

This book provides a practical guide to the congenital and acquired problems related to pediatric surgery and urology. A range of topics are covered, including; abdominal wall hernias, hemangioma and vascular malformations, gastrochesis, achalasia, congenital gastric outlet obstruction, renal and liver tumors, intestinal malrotation, and hydronephrosis. The book aims to be a quick reference text for the diagnosis and treatment of pediatric surgery conditions and presents information relevant to general surgeons, pediatricians, pediatric surgeons, and medical trainees.



Color Atlas of High Resolution Manometry

Author : Jeffrey Conklin

Publisher : Springer Science & Business Media

Page : 98 pages

File Size : 47,86 MB

Release : 2009-04-09

Category : Medical

ISBN : 0387882952

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Book Description

While reflux disease, achalasia, esophageal spasm, gastroparesis and IBS include some of the most common disorders in all disease categories, the understanding of their pathophysiology has remained elusive. The field of clinical gastrointestinal motility has for decades relied on the measurement of intestinal movements for diagnosis and management of these difficult and enigmatic disorders of gut function. Although computers have increased the speed with which we can measure the movements of the gut, the devices to measure this movement have not changed in over 20 years. In the last 2 years, a new technologic breakthrough has taken place in the measurement of intestinal movement. The technology is called high resolution manometry. Rather than the old 4 and 8 channels systems of measuring pressure, high resolution employs 36 closely spaced solid state pressure transducers. By using this technology, the resolution of gut motor activity is incredible. This allows for better ways of viewing motility using color as pressure. This technology makes for beautiful images of gut motility that we have never seen before. We have made diagnoses that would never have been appreciated with the old technology. High resolution manometry is taking over conventional manometry worldwide and represents a dramatic leap in a long time stagnant area.