The anterior interosseous nerve (AIN) is a motor branch of the median nerve that innervates the pronator quadratus, flexor pollicis longus, and flexor digitorum profundus serving the index fing...
Pain in the forearm
Sensory loss not noted
Weakness noted as difficulty with writing or with fine-pinch activities
The signature finding is weakness of the flexor pollicis l...
Once an accurate diagnosis of AIS is made, treatment must be guided by the underlying etiology 1[C].
Penetrating trauma suggests nerve disruption or compression and is best treated with surgi...
Chin DH, Meals RA. Anterior interosseous nerve syndrome. J Am Soc Surg Hand. 2001;1:249–257.
Dang AC, Rodner CM. Unusual compression neuropathies of the forearm, part II: media...
Dysfunction of the AIN is characterized by weakness of the pronator quadratus, flexor pollicis longus, and flexor digitorum profundus serving the index finger.
On examination, the patie...
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