Early Electrodiagnosis of the Ulnar Entrapment Neuropathy at the Elbow

KIMURA, I., AYYAR, D.R. and LIPPMANN, S.M. Early Electrodiagnosis of the Ulnar Entrapment Neuropathy at the Elbow. Tohoku J. exp. Med., 1984. 142(2), 165-172 - Reliable, technically not demanding, electrophysiological tests make it possible to diagnose the ulnar entrapment neuropathy at the elbow. Ulnar nerve was stimulated supramaximally at the wrist, below and above the elbow, and in the upper arm, and the sensory nerve action potential (SNAP) and compound muscle action potential (CMAP) were recorded. Sensory and motor nerve conduction velocities (SNCVs, MNCVs) were calculated in each segment. In 12 of 64 symptomatic extremities of 44 patients with a presumptive diagnosis of the ulnar neuropathy at the elbow MNCVs of all segments were within normal limit and only SNCV across the elbow was significantly slowed (p