KINE 318 Lecture Notes - Lecture 3: Glenoid Labrum, Latissimus Dorsi Muscle, Coracoclavicular Ligament
7 Mar 2017
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Bones: clavicle: slender bone ~6 inches long& shaped like the letter s. point at which the clavicle changes shape is a point of weakness& where the largest amt of fractures occur, scapula: flat, triangular bone. Articulations: sternoclavicular joint (sc): proximal end of clavical + manubrium of the sternum. A fibrocartilaginous disk is interposed btw the 2 surfaces. Weak joint surrounded by a thin, fibrous sleeve& 3 ligaments: superior& inferior acromioclavicular, coraoclavicular ligaments, coracoclavicular joint: not a joint!! The coracoid process of the clavicle joined w coracoclavicular ligament: this ligament divided into the conoid& trapezoid parts. Nerves: 5 anterior nerve rami subdivisions create a nerve network known as the brachial plexus: c5-t1 spinal nerve segments. Rotator cuff: muscles: supraspinatus, infraspinatus, subscapular, teres minor, function: stabilize the shoulder joint& depress the head of the humerus. Abduction: deepest down, bone--labrum--long head of biceps ligaments muscles, muscles- middle deltoid, anterior deltoid, posterior deltoid, supraspinatus.
