The anterior interosseous nerve is a purely motor branch of the Median nerve.
Anatomy
The anterior interosseous nerve accompanies the anterior interosseous artery along its course on the anterior aspect of the interosseous membrane of the forearm, in the volar interosseous plane between the flexor pollicis longus and the flexor digitorum profundus. The nerve terminates in the pronator quadratus.
Innervation
The anterior interosseous nerve innervates the following muscles of the forearm:
Flexor pollicis longus
Pronator quadratus
Flexor digitorum profundus (radial portion)