'(USMLE topics) Phases of the swallowing reflex (deglutition), illustrated in a kid/toddler model. This video is available for instant download licensing here: https://www.alilamedicalmedia.com/-/galleries/all-animations/ear-and-hearing-videos/-/medias/30582865-f00b-4ef7-bd0b-eb20f7d32eda-swallowing-narrated-animation-illustrated-in-children ©Alila Medical Media. All rights reserved. Voice by Sue Stern Support us on Patreon and get FREE downloads and other great rewards: patreon.com/AlilaMedicalMedia All images/videos by Alila Medical Media are for information purposes ONLY and are NOT intended to replace professional medical advice, diagnosis or treatment. Always seek the advice of a qualified healthcare provider with any questions you may have regarding a medical condition. Swallowing consists of three phases: Oral or buccal phase: this is the VOLUNTARY part of swallowing, the food is moistened with saliva and chewed, a food bolus is formed and the tongue pushes it to the back of the throat - the pharynx. This process is under neural control of several areas of cerebral cortex including the motor cortex. Pharyngeal phase starts with the stimulation of tactile receptors in the oropharynx by the food bolus. The swallow reflex is initiated and is under INvoluntary neuromuscular control. The following actions are taken to ensure the passage of food or drink into the esophagus: - The tongue blocks the oral cavity to prevent food from going back to the mouth. - The soft palate blocks entry to the nasal cavity. - The vocal folds close to protect the airway to the lungs. The larynx is pulled up with the epiglottis flipping over COVERING the entry to the trachea. This is the most important step since entry of food or drink into the lungs may potentially be life threatening. - The upper esophageal sphincter opens to allow passage to the esophagus. Esophageal phase: the food bolus is propelled down the esophagus by peristalsis - a wave of muscular contraction that pushes the bolus ahead of it. The larynx moves down back to original position.'
Tags: Health , Food , kids , toddler , baby , children , child , medical , healthcare , Animated , babies , medicine , kid , breathing , swallow , speech therapy , Pediatric , pediatrician , yt quality=high , Anatomy , esophagus , digestive system , dysphagia , mouth , ENT , oesophagus , digestive disorders , deglutition , bolus , oral cavity , trachea , swallowing reflex , 2 years old , ear nose throat , esophageal phase , mechanism , oesophageal , pharyngeal , upper esophageal sphincter , upper respiratory tract
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