The Coracobrachialis is the smallest of the three muscles that attach to the coracoid process of the scapula. (The other two muscles are pectoralis minor and biceps brachii. ) It is situated at the upper and medial part of the arm. It is perforated by and innervated by the musculocutaneous nerve. [WP,unvetted]. [ http://en.wikipedia.org/wiki/Coracobrachialis_muscle ]