Posterior cutaneous nerve of arm

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Posterior cutaneous nerve of arm
Cutaneous nerves of right upper extremity. ("Post. brach. cutan." visible at center left.)
From Radial nerve
Latin Nervus cutaneus brachii posterior
TA A14.2.03.050
FMA 44948
Anatomical terms of neuroanatomy

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.

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This article incorporates text in the public domain from page 943 of the 20th edition of Gray's Anatomy (1918)

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