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Location of the Brain Area Invoved in Suppression of Visual Perception by Transcranial Magnetic Stimulation
Last modified on:
Thursday, November 06, 2008 11:42:14
Copyright © 1994-2008, Information Ventures, Inc.
Perception of extrafoveal visual targets can be suppressed by magnetic stimulation over the occipital lobes. The site of interference for this and similar phenomena, however, has not been well defined. The authors performed experiments to identify the locus of this effect using transcranial magnetic stimulation, supplemented with measurements in a saline-filled model of the head to localize the position of induced electric fields. A single volunteer was required to detect the disappearance of a visual stimulus while being stimulated with 1 of 2 butterfly-shaped stimulus coils. The position of the coils was changed until the volunteer did not perceive the stimulus. The area of the brain stimulated was determined in a saline-filled human head model. The authors concluded that the precise site of visual perception probably lies in cortical area 19, an area whose function has not been well defined. [BENER 14740]
Copyright (c) 1994-2008, Information Ventures, Inc.
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