[Isolated traumatic lesions of the motor nerve branches in the hand].

Isolated injuries of the motor branches of the median and ulnar nerve in the hand are rare. The resulting loss of function is so important that primary or secondary repair is necessary. Using microsurgery techniques the results are very satisfying. The procedure is demonstrated in three cases: 1. Primary perineural suture in a case of double severance of the motor branch of the median nerve caused by the blow of an axe. 2. Resection of neuroma and secondary suture of the motor branch of the median nerve after former knife cut. 3. Bridging a gap in the deep motor branch of the ulnar nerve by autologous nerve grafting after former stab injury of the hypothenar eminence. In all patients denervation after the injury as well as regeneration in the healing process was demonstrated by myography.