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Science 13 July 1973:
Vol. 181. no. 4095, pp. 175 - 177
DOI: 10.1126/science.181.4095.175
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Articles

Self-Stimulation Alters Human Sensory Brain Responses

Edward W. P. Schafer 1 and Marilyn M. Marcus 1

1 Brain-Behavior Research Center, Sonoma State Hospital, Eldridge, California 95431

Human electrocortical potentials evoked by self-administered auditory and visual stimuli manifest much smaller amplitude and faster poststimulus timing than do average brain responses evoked by identical machine-delivered stimuli. Auditory evoked potentials show this "self-stimulation effect" to a greater degree than do visual responses. For visual evoked potentials, the effect appears greater at the vertex association area than over the occipital cortex. Individual differences in the magnitude of the "self-stimutlation effect" relate to level of intelligence.


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Science. ISSN 0036-8075 (print), 1095-9203 (online)