Blink reflex was the helpful electrodiagnostic study that found out the lesions of trigeminal nerve, brain stem and facial nerve. This study has been undertaken to obtain normal values of the reflex response with Cadwell 7400 EMG system, and to determine whether the height or head circumference affect on the latencies of blink reflex. Since March 1987 to May 1988, this study was performed in 56 healthy adults ranging in age from 21 to 30 years.
The results were as follows;
1) Latencies of R1, ipsilateral R2 and contralateral R2 were 9.78±0.75 msec, 26.81±2.60 msec and 27.15±2.70 msec.
2) Upper limit of the difference between two sides in R1 latency was 1.3 msec.
3) Upper limit of the difference between two sides in ipsilateral R2 latency was 7 msec.
4) There was no correlation between height and latency of blink reflex.
5) There was no correlation between head circumference and latency of blink reflex.
