The effect of tactile stimulation upon the Berger rhythm.

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Abstract
This study concerns the effect of tactile stimulation on the alpha or Berger rhythm, in relation to both latency and perseveration time. Two kinds of stimulus, a blunt and a sharp, were used. Stimuli were applied to three areas of the body: the forehead, the eyelid, and the shin. In the great majority of the legible records (70%) the stimuli used were ineffective. For all series where the stimuli were effective the mean latency was 0.48 sec. and the mean perseveration time 1.08 sec. Critical ratios were calculated for several pairs of series. In one pair only, sharp eyelid and sharp shin, was there found a statistically significant mean difference. In general, the latencies are longer and the perseveration time shorter for tactile stimulation than for visual and auditory stimulation. (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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