This study was to determine the normal range of the latency and conduction velocity of the F wave of tibial and sciatic nerves in healthy Koreans.

In ten healthy subjects(nine male and one female) 20 tibial and sciatic nerves were examined.

Both tibial and sciatic nerves were examined separately with a TECA-TD 20 EMG system. No subject showed evidence of neuromuscular system abnormality.

The results are as follows:

1) F wave latency and conduction velocity of the tibial nerve were 28.0±1.6 msec, and 55.2±3.0m/sec respectively.

2) F wave latency and conduction velocity of the tibial nerve were 22.9±1.1 msec, and 61.9±5.1m/sec respectively.

3) Conduction velocity of the sciatic nerve between the buttock and popliteal fossa was 55.0±1.6m/sec respectively.