Name
Pronunciation
(kor-uh-ko-bra-ke-A-lus)
Origin/Proximal Attachment
Coracoid process of the scapula
Insertion/Distal Attachment
Medial shaft of the humerus, at about its middle
Action/Relevance
Flexes the humerusAssists to adduct the humerus
Innervation
Musculocutaneous nerve (C5, 6, +/-7)
Notes
The Coracobrachialis, the smallest of the three muscles in this region, is situated at the upper and medial part of the arm. It arises from the apex of the coracoid process, in common with the short head of the Biceps brachii, and from the intermuscular septum between the two muscles; it is inserted by means of a flat tendon into an impression at the middle of the medial surface and border of the body of the humerus between the origins of the Triceps brachii and Brachialis. It is perforated by the musculocutaneous nerve.