ANP 1106 Midterm: Midterm 2-Topic 5-Muscles.pdf

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

Document Summary

Arrangement of fascicles: all skeletal muscles have fascicles, 4 basic patters, parallel, pennate (featherlike): Can be strap like (sartorius) or fusiform (biceps brachii) Multipennate (e. g. deltoid: convergent, circular: opening (e. g. orbicularis oris) Muscle is triangular or fan-shaped (e. g. pectoralis major) Concentric rings surround ext. openings & contract to close. Immobilize a bone e. g. muscles involved in posture. 5. 3 muscles of the head facial expression. Insert into skin or other muscles, not bones; innervated by the facial nerve: epicranius = main muscle of scalp consists of. 5. 5 muscles of the neck & vertebral column; head & trunk movements: head moved by muscles originating from axial skeleton, sternocleidomastoid (manubrium clavicle to mastoid process of temporal): 2 headed; deep to platysma; prime mover (both muscles) of head flexion; individual muscle action from head rotation to side, head tilts: scalenes (cervical vertebrae to 1st 2 ribs): more laterally and deep to platysma.