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Lecture 8

LING 1P93 Lecture Notes - Lecture 8: Epiglottis, Cerebral Palsy, Laryngectomy


Department
Linguistics
Course Code
LING 1P93
Professor
Richard Welland
Lecture
8

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May 26, 2016
Lecture Eight – LING 1P93
Feeding and Swallowing Disorders
Introduction
The normal swallow
The disordered swallow
Pediatric Feeding and Swallowing Disorders
Adult Feeding and Swallowing Disorders
Terminology
oSwallowing = Deglutition
oChewing = Mastication
oBolus – Food or liquid material formed into a rounded “mass”
oSwallowing Disorder = Dysphagia
Can be caused by:
Neurological disorders and diseases
Head and neck cancers
Side effects of medical treatments
Medical complications
Developmental disabilities
The Normal Swallow
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May 26, 2016
Oral Preparatory Phase
Liquid Bolus
oLips close to form seal
oSides of tongue elevate to form and contain bolus
oCheek muscles tense to contain bolus
oSoft palate lowers to prevent premature spillage into pharynx
Semi-Solid and Solid Bolus
oAdditionally, muscles that control lower jaw allow rotary chewing movements
oSaliva mixed with food material to form bolus
Oral Transport Phase
Lip, tongue, and soft palate “seals” must be maintained
Cheek muscles pressure assists in transporting bolus backward
Tongue “scrapes” along hard palate from front to back – propels bolus backwards
faucial arches/pillars
The Pharyngeal Stage
Soft palate elevates -> vocal folds close tightly; larynx and moves forward (respiration stops
(apneic moment)) -> contraction of pharyngeal constrictor muscles
stasis – when food/liquid does not fully vacate the throat after swallowing
oValleculae
oPyriform Sinus
The Esophageal Stage
UES Opens (UES = Upper Esophageal Sphincter) - >
Smooth muscles contract
LES Opens (LES = Lower Esophageal Sphincter)
The Disordered Swallow
Swallowing can be
oInefficient
Example: Oral stage takes so long to complete that person becomes
fatigued
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