An electrodiagnostic study in chronic alcoholic subjects.

Electrodiagnostic tests were performed on 16 alcoholic subjects and 15 age-matched controls. The tests were done to determine whether nerve conduction parameters differentiate between healthy and alcoholic subjects, and if so, which of these are most useful. Significant differences between alcoholic subjects and controls were found in the following variables: median nerve motor velocity; median nerve sensory latency, amplitude and velocity; ulnar nerve motor amplitude and velocity; ulnar nerve sensory amplitude, latency and velocity; sural nerve sensory amplitude and velocity; and peroneal motor amplitude and velocity. The combination of ulnar and sural sensory conduction velocity tests identified 85% of the chronic alcoholic subjects by stepwise discriminant analysis. Tibial nerve H-reflex latencies were either absent or prolonged in 63% of the subjects. Bilateral facial nerve amplitudes and latencies were normal. The ulnar sensory amplitude and ulnar sensory velocity inversely correlated with the duration of excessive alcohol drinking.