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Averaged evoked visual potentials were recorded from 12 Ss during periods of sleep deprivation ranging from 7-36 h. Evoked potentials were analyzed with respect to the density of frequency components 2-20 cps which were present. The results suggest that the density of all frequencies increase at 15 h of deprivation and thereafter decrease. The density of lower frequencies, i.e., 2 and 4 cps, declines less rapidly than higher frequencies between 15 and 27 h of deprivation. The results are interpreted to suggest that there is an increase in arousal at 15 h of sleep deprivation and thereafter a decrease.

The effect of sleep deprivation on frequency components of the averaged evoked potential