Mar 02, 2011 this presentation discusses the physiology of deglutition. The process of swallowing, also known as deglutition, involves moving a substance from the mouth via the pharynx and esophagus to the. Peristaltic waves push the bolus through the esophagus and into the stomach. Physiology of deglutition digestive system neuroanatomy. The teeth come early in maximum intercuspation contacts, to allow jaw stabilization. The normal swallow in humans was originally described with a threestage sequential model. Choose from 500 different sets of deglutition anatomy physiology flashcards on quizlet. It is an essential and complex behavior learned very early in development. Anatomy, physiology and pathophysiology of deglutition ku. Nov 12, 2010 clinical case studies include hernia, celiac disease, stomach ulcer, diarrhea, lactose intolerance and pancreatic secretions and blockage. The initial stage of deglutition, the oral phase, is voluntary and triggers the subsequent involuntary pharyngeal and esophageal phases. Below we will briefly describe the major anatomical and physiological components for each of the swallowing events, i. There, food is mixed with saliva for lubrication and placed on the back of the tongue. Deglutition definition, the act or process of swallowing.
Principles of deglutition pdf free pdf epub medical books. Swallowing, sometimes called deglutition in scientific contexts, is the process in the human or animal body that allows for a substance to pass from the mouth, to the pharynx, and into the esophagus, while shutting the epiglottis. Swallowing is an important part of eating and drinking. Coordination of deglutition and phases of respiration.
Normal deglutition is a smooth coordinated process that involves a complex series of voluntary and involuntary neuromuscular. Deglutition swallowing complicated neuromuscular act of transfer of food from mouth to the stomach through pharynx and oesophagus three successsive stages first stage in mouth voluntary second in pharynx involuntary third in oesophagus involuntary. Teramoto and colleagues on our article in chest february 2002. Clinical case studies include hernia, celiac disease, stomach ulcer, diarrhea, lactose intolerance and pancreatic secretions and blockage. The effect of sleep, spontaneous gastroesophageal reflux, and a meal on ues pressure in normal human volunters. Pdf eating and swallowing are complex behaviors involving volitional and reflexive. Phase 1 oral preparatory phase of the swallow the food is manipulated masticated if a solid into a cohesive unit referred to as a bolus in preparation for the remaining. Although the main function of deglutition is the propulsion of food from the oral cavity into the stomach, it can also serve as a protective reflex for the digestive and. The act of swallowing has been described as the most complex reflex which can be reproduced by the stimulation of a peripheral nerve. Therefore, the actual motor event of swallowing can be best described as being composed of an oropharyngeal stage and a subsequent esophageal stage.
Anatomy and physiology of the larynx and hypopharynx. Icy, swallowing is considered to be voluntary ause deglutition can be elicited by cerebral in p ut when one. Grab your own copy of textbook in pdf ebook format now. Articulation is the process of bringing the mobile and immobile articulators. Pdf development, anatomy, and physiology of the pharynx. An understanding of swallowing disorders rests mostly on a knowledge of the normal physiology of deglutition. Deglutition is the transport of a bolus of food or liquid from the mouth to the stomach. When bolus is prepared, its collected on the tongue and directed toward isthmus of the gullet, to be swallowed. Anatomy and physiology of feeding and swallowing normal.
Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Poor tongue movement in chewing or in the oral swallow can cause food to fall into the pharynx and into the. A major portion of the overall system involved in mastication and deglutition may be called the stomatognathic system sto mato, meaning. Swallowing, also called deglutition, the act of passing food from the mouth, by way of the pharynx or throat and esophagus, to the stomach. The pharynx assists in the shared functions of respiration and swallowing deglutition.
Anatomy, physiology, clinical diagnosis and management perlman, adrienne l. Reference scott brown otorhinolaringology and head and neck surgery 7th edition cummings orlhns 6th edition glyton and hall text book of physiology. The tongue compresses the bolus against the hard palate and then passes it through the pharynx and into the esophagus. Kahrilas pj, dodds wj, dent j, haeberle b, hogan wj, arndorfer rc. Surgical anatomy and physiology of swallowing operative. Sensory recognition of food approaching mouth and being. The pharyngeal phase occurs involuntarily when food enters the pharynx, as follows. Guyton and hall is a book for first year mbbs students and is the best and recommended book for physiology. At the end of this course students have extended knowledge and insight in the physiology and pathophysiology of the different stages of swallowing and can apply the acquired knowledge and insights into primary and secondary physiological processes.
Physiology of deglutition free download as powerpoint presentation. Scribd is the worlds largest social reading and publishing site. Part of this pathway shares anatomy with the airway, so in addition to directing food into the digestive system, the swallowing mechanism serves as a vital protector of the. The process of swallowing, also known as deglutition, involves moving a substance from the mouth via the pharynx and esophagus to the stomach. Pdf anatomy and physiology of feeding and swallowing. Bosma departments of physiology and pediatrics, college of medicine, university of utah, salt lake city 1, utah received for publication january 26, 1955 deglutition is a reflex coordination readily accessible and conveniently. The soft palate and uvula fold upward and cover the nasopharynx to prevent the passage of food. Carla fedor, rn, cddn continuum of care university of new. Many disturbances in oropharyngeal physiology can result in aspiration.
Learn vocabulary, terms, and more with flashcards, games, and other study tools. Normal and abnormal article pdf available in physical medicine and rehabilitation clinics of north america 194. Surgical anatomy and physiology of swallowing sciencedirect. The buccal phase occurs voluntarily in the mouth when the tongue forces the bolus of food toward the pharynx. The act of swallowing must occur in a sequential and coordinated fashion in order to propel the food bolus into the esophagus and stomach without penetration into the larynx.
Pdf the larynx is part of the respiratory system and is located at the upper level of the airway fig. If you continue browsing the site, you agree to the use of cookies on this website. Learn deglutition anatomy physiology with free interactive flashcards. Topics covered include stage descriptions of deglutition, neural regulation, sensory processes, and principles of motor. View the article pdf and any associated supplements and figures for a period of 48 hours. Deglutition deglutition is the act of swallowing, through which a food or liquid bolus is transported from the mouth through the pharynx and esophagus into the stomach. The instrumental evaluation most frequently used for esophageal dysphagia is the standard barium swallow or upper gastrointestinal series. Under these swallowing conditions, the pharyngeal phase of deglutition involves not only pharyngeal and laryngeal muscles, but also muscles in the oral cavity such as the tongue and suprahyoid muscles.
Anatomy, physiology, clinical diagnosis, and management. To successfully diagnose and treat dysphagia, a thorough understanding of deglutition is essential. A problem with any of these structures can lead to dysphagia and a decrease in the quality of life in patients suffering from it. Swallowing, or deglutition, is divided into three phases.
Physiological substrates of normal deglutition springerlink. An electromyographic analysis of reflex deglutition physiology. Two paradigmatic models are commonly used to describe the physiology of normal eating and swallowing. Altered swallowing physiology and aspiration in copd. This presentation discusses the physiology of deglutition.