Source of Support: None, Conflict of Interest: None
Electrodiagnostic examination was conducted in 65 clinically diagnosed cases of carpal tunnel syndrome, subjecting them to motor and antidromic sensory nerve conduction study of the median nerve and also needle electromyography of the thenar muscles. The parameters especially studied and evaluated were distal motor latency (D.M.L), distal sensory latency (D.S.L.) and the character of evoked potential. These studies had a diagnostic accuracy of 98.27 percent. Of all the parameters D.S.L. was the most sensitive (95%) parameter and its prolongation was the earliest change to appear in carpal tunnel syndrome.