Anterior interosseous nerve
The anterior interosseous nerve is a branch of the median nerve. This tiny nerve arises from the posterior aspect of the median nerve, between the two heads of the pronator teres muscle.
While the nerve descends through the proximal forearm, it courses between the flexor pollicis longus and flexor digitorum profundus muscles. It travels alongside the anterior interosseous artery.
In the distal forearm, the nerve courses adjacent to the pronator quadratus muscle and terminates by giving off small terminal branches around the wrist joint.
The main function of the anterior interosseous nerve is to supply the muscles of the forearm including the:
- Flexor pollicis longus muscle
- Lateral aspect of the flexor digitorum profundus muscle
- Pronator quadratus muscle
In addition, it provides innervation for the distal radioulnar, radiocarpal and some intercarpal joints.
English: Anterior interosseous nerve
Latin: Nervus interosseous anterior
|Definition||The anterior interosseous nerve is a posterior branch of the median nerve located in the forearm.|
|Innervation||Flexor pollicis longus muscle, flexor digitorum profundus, pronator quadratus muscle, distal radioulnar joint, radiocarpal joint and some intercarpal joints.|
Learn more about the neurovasculature of the forearm with the following study unit:
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