ANAT 315 Chapter Notes - Chapter Upper Limb: Bulgarian Lev, Serratus Anterior Muscle, Rhomboid Major Muscle
3 Oct 2016
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Document Summary
Glenoid fossa is a pear-shaped depression at lateral angle of. Movement scapula; it faces antero-laterally and provides a socket. Head of humerus is 1/3 of sphere, and the contact of head of humerus and scapula is enhanced by the glenoid labrum (fibrocartilage) Med rotate: teres major, lat. dorsi, biceps, subscapularis, pec major. All ligaments are weak except for the coracohumeral. Greatest contribution to the strength of the joint = rotator cuff muscles. Large complex anastomosis around the joint supplies blood small arteries are form the axillary artery. Branches of nerves that cross the joint innervate it. Greatly increases mobility and flexibility of shoulder joint. The scapula is held to the upper thoracic cage solely by muscles that control the joint"s movement. Can be rotated around a axis, the rotate glenoid fossa up/down. Elevators (of scapular): levator scapulae, upper 1/3 of trapezius. Upward rotation (of glenoid fossa): upper 1/3 and lower 1/3 of trapezius, serratus anterior.
