ANP 1106 Lecture Notes - Lecture 10: Sphenoid Bone, Zygomatic Arch, Zygomatic Bone

• School: University of Ottawa
• Department: Anatomy and Physiology
• Course: ANP 1106
• Professor: Jackie Carnegie

Document Summary

Apa1106 tongue muscles fan shaped muscle forms the bulk of the inferior part of the tongue its attachment anchors the tongue to the mandible and prevents the tongue from falling back and obstructing breathing. Origin internal surface of mandible near symphysis. Protracts tongue, can depress or act in concert with other extrinsic muscles insertion inferior aspect of tongue and body of hyoid bone to retract tongue. Origin body and greater horn of hyoid bone. Depresses tongue and draws its sites inferiorly especially lateral margins. Hypoglossal nerve supply (xii) insertion inferolateral tongue. Styloglossus slender muscle running superiorly to and at right angles to hypoglossus. Hypoglossal nerve supply (xii) insertion inferolateral tongue retracts and elevates tongue. Powerful muscle that covers lateral aspect of mandibular ramus. Prime mover of jaw closure, elevates mandibule and is powerful insertion angle and ramus of mandible trigeminal nerve supply (v) Temporalis fan shaped muscle that covers parts of the temporal, front and parietal bones.