Health Sciences 2300A/B Study Guide - Final Guide: Long Thoracic Nerve, Pronator Teres Muscle, Brachial Plexus
29 Apr 2015
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Document Summary
Anterior brachium: powerful flexors of elbow, assists in shoulder flexion, supinates forearm, arm = the location where the humerus lies, posterior/anterior compartment, musculocutaneous nerve innervates all these. Biceps brachii: has two origins (two heads, the two heads come down to form a large belly. Inserts onto the bicipital tuberosity on the radius: crosses two joints (shoulder/elbow joint) Has many more functions (supination of the elbow: radial (bicipital) tuberosity and bicipital aponeurosis. Bicipital aponeurosis encloses head of the muscles the anterior forearm. It keeps it tight in the elbow, and assists in the strength & leverage of these muscles (similar to tensor fascia) Long head a long tendon that runs up in between the humerus tubercles (bicipital groove/intratubercular groove: originates on the supraglenoid tubercle. Short head it moves across the shoulder (more to the anterior aspect: originates on the crow"s beak (corocoid process, ligaments are attached to this corocoid process.
