Corpus: Anterior interosseous nerve

The anterior interosseous nerve is a pure motor branch of the median nerve.

The anterior interosseous nerve runs alongside the anterior interosseous artery on the front side of the interosseous membrane of the forearm in the volar interosseous space. This space is located between the flexor pollicis longus muscle and the flexor digitorum profundus muscle. The nerve terminates in the pronator quadratus muscle.

The anterior interosseous nerve innervates the following muscles of the forearm:

• Flexor pollicis longus muscle
• Pronator quadratus muscle
• Flexor digitorum profundus muscle (radial parts)

Compression or other traumatic damage to the nerve can result in anterior interosseous nerve syndrome.