Anterior Interosseous Nerve Syndrome

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Anterior Interosseous Nerve Syndrome
Synonym Kiloh-Nevin Syndrome
Pathophysiology Entrapment of the anterior interosseous nerve, most commonly ~5-8cm distal to the medial epicondyle.
Clinical Features Pure motor palsy affecting pollicis longus, flexor digitorum profundus, pronator quadratus.

Clinical Features

Pure motor palsy. There is difficulty making an "OK" sign with thumb and forefinger opposition. It is distinguished from pronator syndrome by the complete absence of a sensory deficit.

Literature Review