BMS 250 Lecture Notes - Lecture 9: Orbicularis Oculi Muscle, Orbicularis Oris Muscle, Occipitalis Muscle
Document Summary
Flexion- shortening the muscle and bending or decreasing the angle between bones of the lumb. Extension- lengthen the muscle and increase the angle between the bones of the limb. Inversion- soles of feet point toward one another. Eversion- soles of feet point outward of one another. Depression- back to anatomical position, move back to inferior parts. Frontal belly of occipitofrontalis elevates: eyebrows and wrinkles skin of the forehead. Masseter elevates and protracts mandible origin- zygomatic process insertion- coracoid process, angle, and lateral surface of ramus. Sternocleidomastoid flexion of neck(cid:345)bla(cid:346) /ula- lateral flexion head insertion- mastoid process of temporal bone. External oblique flexion bla- vertebral column/ula lateral flexion. Internal oblique flexion bla- vertebral column/ ula lateral flexion. Transverse abdominis flexion bla- vertebral column/ula lateral flexion. Trapezius elevates- scapula(cid:345)superior fibers(cid:346) and depresses- scapula(cid:345)inferior fibers(cid:346) retracts- scapula(cid:345)middle fibers(cid:346) Latissimus dorsi extension- arm adduction- arm/ medial rotation of arm. Pectoralis major flexion- arm adduction- arm/ medial rotation of arm.
