Kinesiology 2222A/B Lecture Notes - Lecture 18: Ulnar Nerve, Axillary Nerve, Thenar Eminence
12 Jan 2016
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Document Summary
Acts on two joints: shoulder and elbow. 2 enclosed compartments that are separated with fascia: anterior, posterior. Best known for the biceps femoris very superficial and large muscle belly. Most notable attachment is the bicipital tuberosity located on the radial bone. Bicipital tuberosity is the attachment for the biceps femoris. Biceps does not attach to the humerus. Biceps has two origins: long head attaches to the supraglenoid tubercle, and the shorter head attaches to the coracoid process. All muscles in the anterior arm are innervated by the. Coracobrachialis is innervated by the musculocutaneous nerve. Origin is the coracoid process, innervation is the humerus. Brachialis is the most powerful flexor of the elbow and all. Flexes the shoulder because it crosses the. It attaches to radius, when contracted, it hold radius in place, when pronating the radius crosses over, you need to relax biceps in order to pronate. To bring back to supinated, biceps is working.
