Posterior cutaneous nerve of arm

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Nerve: Posterior cutaneous nerve of arm
Cutaneous nerves of right upper extremity. Posterior view. ("Post. brach. cutan." visible at center left.)
[[Image:|250px|center|]]
Latin	n. cutaneus brachii posterior
Gray's	subject #210 943
Innervates
From	radial nerve
To
MeSH	[1]

The posterior cutaneous nerve of arm (internal cutaneous branch of musculospiral, posterior brachial cutaneous nerve) is a branch of the radial nerve that provides sensory innervation for much of the skin on the back of the arm. It arises in the axilla.

It is of small size, and passes through the axilla to the medial side of the area supplying the skin on its dorsal surface nearly as far as the olecranon.

In its course it crosses behind, and communicates with, the intercostobrachial.

See also

• Lateral brachial cutaneous nerve
• Medial brachial cutaneous nerve
• Dorsal antibrachial cutaneous nerve

Additional images

Cross-section through the middle of upper arm.

Cutaneous nerves of right upper extremity. Anterior view.

Diagram of segmental distribution of the cutaneous nerves of the right upper extremity. Anterior view.

Diagram of segmental distribution of the cutaneous nerves of the right upper extremity. Posterior view.

External links

• EatonHand ner-136

• Hand kinesiology at University of Kansas nerves/radial.htm

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 As such, some of the information contained herein may be outdated.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.