[Monofascicular nerve rotation]

In case of the loss of one single muscle function in the hand, the possibility of a neurogenic cause should not be overlooked. The differential diagnosis includes: 1. Partial compression; 2. anatomical variation; 3. monofascicular rotational distorsion. Rotational distorsion of a nerve has previously been described by A. Wilhelm (1976). This type of compression syndrome occurs after repeated forceful muscle contractions and may involve for example either exclusively those fascicles in the main trunk of the median nerve, forming the anterior interosseous nerve or the deep branch of the radial nerve. We report a series of six patients in whom torsional nerve injury was found.