Motor and sensory latencies of the median nerve using conventional techniques in normal subjects and patients with a history compatible with carpal tunnel syndrome are measured.

In addition, measurement of sensory latency of ulnar nerve using conventional technique, and difference of median-ulnar distal sensory latencies are described. It is concluded that the use of measurement of median palmar sensory latency adds to the sensitivity of the nerve conduction studies in the diagnosis of carpal tunnel syndrome.

So, in patients with suspected carpal tunnel syndrome in whom conventional nerve conduction studies are normal, the measurement of palmar sensory latency are very useful in the diagnosis of carpal tunnel syndrome.