Medial cutaneous nerve of arm

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Nerve: Medial cutaneous nerve of arm
Diagram of segmental distribution of the cutaneous nerves of the right upper extremity. Anterior view.
[[Image:|250px|center|]]
Latin	n. cutaneus brachii medialis
Gray's	subject #210 937
Innervates
From	medial cord
To
MeSH	[1]

The Medial Brachial Cutaneous Nerve (lesser internal cutaneous nerve; nerve of Wrisberg, medial cutaneous nerve of arm) is distributed to the skin on the ulnar side of the arm.

It is the smallest branch of the brachial plexus, and arising from the medial cord receives its fibers from the eighth cervical and first thoracic nerves. It passes through the axilla, at first lying behind, and then medial to the axillary vein, and communicates with the intercostobrachial nerve.

It descends along the medial side of the brachial artery to the middle of the arm, where it pierces the deep fascia, and is distributed to the skin of the back of the lower third of the arm, extending as far as the elbow, where some filaments are lost in the skin in front of the medial epicondyle, and others over the olecranon.

It communicates with the ulnar branch of the medial antibrachial cutaneous nerve.

See also

• Lateral brachial cutaneous nerve
• Posterior brachial cutaneous nerve

Additional images

Brachial plexus

Cutaneous nerves of right upper extremity. Anterior view.

Cutaneous nerves of right upper extremity. Posterior view.

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

External links

• SUNY Figs 06:03-04
• EatonHand ner-017

• Hand kinesiology at University of Kansas nerves/medialcutan.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 As such, some of the information contained herein may be outdated.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.

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