Pattern-reversal visual evoked potentials were studied in 123 volunteers with ages ranging from 20 to 77 years. The major positive component (P100) showed a shorter mean latency but a higher mean amplitude for females than males. The age-dependent increase in mean P100 latency was observed in the female group but not in the male group. The present data suggest that gender is more important than age in affecting the P100 latency.
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