It also supplies coracobrachialis, biceps brachii, brachialis, and the forearm skin close to the insertion of each of those muscles.
The nerve may pass under the coracobrachialis or through the biceps brachii. 4.
It pierces the coracobrachialis muscle and gives off branches to the muscle, as well as to brachialis and biceps brachii.
Actual rupture to the coracobrachialis muscle is extremely rare.
Therefore, the contraction of the coracobrachialis leads to two distinct movements at the shoulder joint.
It may adhere for some distance to the median and then pass outward, beneath the biceps brachii, instead of through the coracobrachialis. 2.
Symptoms include paralysis of the biceps, brachialis, and coracobrachialis (through the musculocutaneous nerve); the brachioradialis (through the radial nerve); and the deltoid (through the axillary nerve).
The anterior humeral circumflex artery runs horizontally, beneath the coracobrachialis and short head of the biceps brachii muscle, in front of the neck of the humerus.
