Coracobrachialis muscle
On to the next muscle – the next reflex muscle! Today’s focus? The coracobrachialis muscle. This upper arm muscle is responsible for flexion and assists with adduction of the arm. The muscle is innervated by the C5–C7 spinal segments. The coracobrachialis muscle plays a significant role in conditions such as subacromial impingement.
It is also interesting to note that the origin of the coracobrachialis muscle is the same as that of the biceps brachii muscle (short head). Incidentally, the tendons of both muscles merge into one another. In other words, isolating treatment of the coracobrachialis muscle may be of little benefit without also taking the short head of the biceps into account.
Its trigger point radiates across the anterior aspect of the deltoid muscle, down the upper arm, to the forearm and as far as the back of the hand.
