CSD-2260 Lecture Notes - Lecture 20: Levator Labii Superioris Alaeque Nasi Muscle, Tongue Depressor, Risorius

• School: App State
• Department: Communication Sciences and Disorders
• Course: CSD-2260
• Professor: Jennifer Dalton

Document Summary

Chapter 6 continued: articulatory system depends on three important structures, 1. Movement for speech depends on muscles of face. Risorius superficial retracts corner of mouth. Buccinator- deep to risorius, retracts corner of mouth, involved in mastication. Levator labii superioris, zygomatic minor, levator labii superioris alaeque nasi- elevate upper lip. Levator anguli oris- draw mouth up and medially. Zygomatic major- elevate and retract angle of the mouth smiling. Depressor labii inferioris pull lip down and out. Depressor anguli oris- depress corners of mouth. Mentalis- elevates and wrinkles chin, pulls lower lip out pout. Can act as an organ of expression. Contains taste buds located in papillae on tongue. Taste buds located in papillae on tongue. Extrinsic muscle- move tongue in desired direction. Oral surface-2/3 of tongue, pharyngeal surface 1/3. Lingual tonsils- below pharyngeal surface of the tongue. Palatoglossus- elevates back of the tongue, makes up anterior faucial arch. Temporalis- elevates mandible and draws it back if protruded.