Superior lateral cutaneous nerve of arm

The superior lateral cutaneous nerve of arm (or superior lateral brachial cutaneous nerve) is the continuation of the posterior branch of the axillary nerve, after it pierces the deep fascia. It contains axons from C5-C6 ventral rami.

It sweeps around the posterior border of the deltoideus and supplies the skin over the lower two-thirds of the posterior part of this muscle, as well as that covering the long head of the triceps brachii.

• Posterior cutaneous nerve of arm (Posterior brachial)
• Medial cutaneous nerve of arm (Medial brachial)
• Lateral cutaneous nerve of forearm (Lateral antebrachial)

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  Cutaneous nerves of right upper extremity.
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  Diagram of segmental distribution of the cutaneous nerves of the right upper extremity.

This article incorporates text in the public domain from page 934 of the 20th edition of Gray's Anatomy (1918)

• Photo at mun.ca