ULNAR NERVE LESION IN THE PALM - REPORT OF AN UNUSUAL CASE

We report the case of a patient who had weakness of the fourth dorsal interosseous (DI) and third palmar interosseous (PI) muscles resulting in the abducted position of the little finger at rest. Electromyograp hic abnormalities were limited to only these muscles with partial dene rvation findings. The results of routine nerve conduction studies and imaging techniques were normal. Clinical and electrophysiological find ings suggested that the lesion had occurred distal to the point where the very small motor branches to these muscles exit the deep palmar br anch of the ulnar nerve. (C) 1997 by the American Congress of Rehabili tation Medicine and the American Academy of Physical Medicine and Reha bilitation.