Coracobrachialis Muscle – Attachments, Action & Innervation

Author: Scott A. Sheffield MS

Last update:

Coracobrachialis is one of the three muscles that comprise the anterior compartment of the arm. Its action is mainly antagonist to the action of the deltoid muscle.

image descriptionCoracobrachialis Muscle

An image showing some muscles attached to the upper limb (Detloid, Pectoralis major, Latissimus dorsi, Pectoralis major, Biceps brachii, Brachioradials)
An image showing some muscles attached to the upper limb (Detloid, Pectoralis major, Latissimus dorsi, Biceps brachii)
An image showing the Coracobrachialis Muscle attached to the upper limb along with other muscles (Subscapularis, Teres major, Triceps brachii, Biceps brachii)
An imagw showing the Coracobrachialis Muscle muscle attached to the upper limb
1
2
3
4

image descriptionAttachments of Coracobrachialis Muscle: Origin & Insertion

Origin: (proximal attachments)
Coracoid process of scapula.

Insertion: (distal attachments)
Mid-medial surface of humerus.

An image showing some muscles attached to the upper limb (Detloid, Pectoralis major, Latissimus dorsi, Pectoralis major, Biceps brachii, Brachioradials)
An imagw showing the Coracobrachialis Muscle muscle attached to the upper limb
An image showing the origin and insertion of the Coracobrachialis Muscle on the upper limb
1
2
3

Learn the muscles of the arm and shoulder quicker with these quizzes, diagrams and worksheets.

Actions of Coracobrachialis Muscle:

image descriptionFlexes and image descriptionadducts arm at shoulder.

Innervation of Coracobrachialis Muscle:

image descriptionNerves to the muscle:
a. Musculocutaneous nerve.
image descriptionNerve roots:
b. C5, C6, and C7.
An image showing the Musculocutaneous nerve coming out of the brachial plexus
An image showing the Musculocutaneous nerve coming out of the brachial plexus
1
2

Interactive quiz with the muscles that act on the arm

Muscles That Act On The Anterior Arm

Related Articles
Featured image showing two views of the posterior upper arm and shoulder. The image on the left shows the bony elements and the muscles of the posterior upper arm and shoulder, the image on the left shows isolated Triceps Brachii Long head.
Triceps brachii muscle

The long head of the Triceps brachii is one of three heads that make up the muscle. It descends between teres minor and major, dividing the wedge-shaped interval between them and the humerus into triangular and quadrangular spaces.

Brachialis Muscle - Featured
Brachialis Muscle

Brachialis Muscle (Insertion, Origin, Actions & Innervations); explained beautifully in an illustrated and interactive way.
Anterior view of the thorax and upper limb, showing the highlighting the biceps brachii and its origin and insertion
Biceps Brachii – Attachments, Action & Innervation

Biceps brachii is one of the main muscles of the upper arm which acts on both the shoulder joint and the elbow joint. It derives its name from the fact that it consists of two parts (heads), both innervated by the musculocutaneous nerve.