LING 1P93 Lecture Notes - Lecture 12: Pharyngeal Muscles, Cleft Lip And Cleft Palate, Aspiration Pneumonia

• School: Brock University
• Department: Linguistics
• Course: LING 1P93
• Professor: Richard J Welland

Document Summary

Liquid bolus: lips close to form a seal, sides of tongue elevate to form and contain bolus, cheek muscles tense to contain bolus, sot palate lowers to prevent premature spillage into pharynx. Semi-solid and solid bolus: addiionally, muscles that control lower jaw allow rotary chewing movements, saliva mixed with food material to form bolus. *something could go wrong at any of these levels. Lips may not form a seal, may not have enough tone in cheek muscles, sot palate may not lower, so lose food and falls into pharynx prematurely. Lip, tongue, and sot palate seals must be maintained. Cheek muscle pressure assists in transporing bolus backward. Tongue scrapes along hard palate from front to back- propels bolus backward. Vocal folds close ightly; larynx elevates and moves forward. *all happens very quickly- only 1 second total. Example: oral stage takes so long to complete that person becomes faigued and can"t inish meal: unsafe.