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Effect of attention on the VEP in binocular and monocular conditions
Author(s) -
HeravianShandiz J.,
Douthwaite W. A.,
Jenkins T. C. A.
Publication year - 1992
Publication title -
ophthalmic and physiological optics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.147
H-Index - 66
eISSN - 1475-1313
pISSN - 0275-5408
DOI - 10.1111/j.1475-1313.1992.tb00313.x
Subject(s) - monocular , stimulus (psychology) , audiology , binocular vision , evoked potential , psychology , binocular rivalry , optics , visual perception , medicine , physics , neuroscience , perception , cognitive psychology
To study the effect of voluntary concentration on the visual evokedotential (VEP) with monocular and binocular rivalry stimulation, attern reversal VEPs were recorded using 5.5 min arc and 50 min arc check sizes. Subjects viewed the VEP stimulus with the left eye and a light emitting diode (LED) with the right eye. They were asked to concentrate on either the VEP stimulus or the LED. The two targets were arranged so that the left eye remained accurately focused on, and directed to. the centre of the VEP stimulus throughout the recordings. The binocular VEP wave became attenuated when the subject concentrated on the LED. The wave was reduced lo around two–thirds of the amplituderesent when concentrating on the VEP stimulus. This reduction in the VEP amplitude is considered lo be due to a binocular interaction because there was a lack of amplitude attenuation when the experiment was repealed with monocular conditions. The results also suggest that the wave is smaller when the non–dominant eye receives the VEP stimulus compared with that when the dominant eye is stimulated by the VEP target.