MEDRADSC 2RA3 Lecture Notes - Lecture 12: Thoracic Vertebrae, Hyoglossus, Hyoid Bone

• School: McMaster University
• Department: Medical Radiation Sciences
• Course: MEDRADSC 2RA3
• Professor: Trainor

Document Summary

Highlight - kahoot questions / answers: muscles of the neck not easily distinguished form one another. All responsible for inducing peristaltic waves during swallowing: where they sit -> makes sense they induce, longitudinal. Three as well: stylopharyngeus, palatopharyngeus, salpingopharyngeus. All involved w elevating pharynx and larynx during speaking: tongue. Extrinsic muscles of the tongue: genioglossus - largest, most medial, hyoglossus, styloglossus - most lateral. All responsible for changing the position of the tongue. From medial to lateral: genio -> hyo -> stylo. Sternocleidomastoid: divides the neck into anterior and posterior triangles. Divisions within each triangle: described as broad and strap-like, originates at sternum and clavicle, inserts on the mastoid process, function - turn head side to side and flex the neck, anterior triangle. Both groups based on the hyoid bone: hyoid bone, superior to the thyroid cartilage, inferior to the mandible, forms base for tongue muscles -> comes down to it. Platysma - most anterior/superficial muscle of anterior triangle.