SAR SH 522 Lecture Notes - Lecture 17: Hypoglossal Nerve, Epiglottis, Facial Nerve

• School: Boston University
• Department: Speech, Language & Hearing Sciences
• Course: SAR SH 522
• Professor: Polyak

Document Summary

Intrinsic all innervated by cn xii hypoglossal nerve. Muscles that have both attachments within the tongue. Produce the rapid and delicate articulations needed for speech and non speech tasks. Origin: near epiglottis, hyoid, and median brous septum. Insertion: lateral margins of the tongue and apex. Origin: tongue root and corpus of hyoid. Inferior runs along the sides of the tongue while superior one runs through all the dorsum. Inferior runs in parallel but not all over the root of the tongue. If you contract both inferior muscles, your tongue will be pulled down. Function: pulls the edges of the tongue to midline narrows the tongue. Function: pulls the tongue down to the oor of the mouth. Muscles that have one attachment within the tongue and one attachment outside of the tongue. Provide gross muscle movement of the tongue in and out and up and down. Insertion: dorsum of the tongue and corpus of the hyoid.