Coracobrachialis muscle
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| Coracobrachialis muscle | ||
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| Front of right upper extremity. (Coracobrachialis labeled at right, fourth from the bottom.) | ||
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| The right brachial plexus (infraclavicular portion) in the axillary fossa; viewed from below and in front. The Pectoralis major and minor muscles have been in large part removed; their attachments have been reflected. (Coracobrachialis visible at center left.) | ||
| Latin | musculus coracobrachialis | |
| Gray's | subject #124 443 | |
| Origin: | coracoid process of scapula | |
| Insertion: | medial humerus | |
| Blood: | brachial artery | |
| Nerve: | musculocutaneous nerve | |
| Action: | adducts humerus | |
| Dorlands/Elsevier | m_22/12548663 | |
The Coracobrachialis is the smallest of the three muscles that attach to the coracoid process of the scapula. (The other two muscles are the pectoralis minor and the biceps brachii.) It 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 and innervated by the musculocutaneous nerve.
[edit] Variations
A bony head may reach the medial epicondyle; a short head more rarely found may insert into the lesser tubercle.
[edit] Additional images
 The veins of the right axilla, viewed from in front. |
[edit] External links
This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.
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