Shoulder Muscle
Shoulder Muscle , m.
Brachialis
, Rather broad, fleshy, fusiform, lying under the biceps arm muscle, on the front surface of the lower half of the shoulder. It starts from the outer and the front surfaces of the distal half of the humerus, horseshoe-like covering the attachment site m. Deltoidei, as well as from the lateral and medial intermuscular partitions of the shoulder. Moving through the elbow joint, the tendon of the muscle with deep bundles grows together with its articular capsule and is attached to the tuberosity of the ulna.
Function: flexes the forearm in the elbow joint and pulls the joint capsule of the elbow joint.
Innervation: n. Musculocutaneus (C5-C7).
Blood supply: aa. Collaterales ulnares superior et inferior, aa. Brachials et recurrent radialis.
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