Electrophysiological Study of Carpal Tunnel Syndrome

The purpose of this study was to investigate the electrophysiological prognosis of carpal tunnel syndrome (CTS) with surgical treatment.Ten female patients were studied, one of whom had a bilateral operation. We studied the motor terminal latency (MTL), sensory terminal latency (STL), amplitude of the compound muscle action potential (CMAP) and the evoked mixed nerve action potential (EMNAP). Results revealed that MTL had improved within 6 months after surgery. STL could be detected in only one patient, and the others could not be detected before operation. But in most cases, they were detected between 6 and 12 months after operation.CMAP improved between 6 and 12 month. Regarding EMNAP, there was a difference in the degree of recovery between severe and less severe CTS cases.