Antidromic Sensory Conduction

Sears (1959) stimulated the median nerve at the wrist and recorded the antidromically evoked sensory potential from the fingers. Since a larger response is usually obtained with antidromic conduction (Buchthal and Rosenfalck, 1966), and as its latency has been believed to be identical with that of orthodromic conduction (Campbell, 1962; Ruskin and Rogoff, 1964; Goodgold and Eberstein, 1972), this technique is now often preferred in daily electrodiagnostic practices. In the present study, we compared the latencies of orthodromic and antidromic sensory potentials. The negative peak latency was found to be longer in antidromic sensory conduction, and the latency to depend on the distance between the recording electrodes.