- outpatient or inpatient subject with numbness of arm, clinically met diagnostic criteria of AAEM(American association of Electrodiagnostic Medicine CTS task force), and proven to have distal motor neurological disorder through nerve Conduction Study (distal motor latency >4.6 msec, decreased SNAP < 12uV or prolonged median sensory distal latency (palm to wrist) > 2.5msec)。