Retinal processes involved in the evoked cortical potential to patterned stimuli

UNCG Author/Contributor (non-UNCG co-authors, if there are any, appear on document)
William Franklin Greer (Creator)
The University of North Carolina at Greensboro (UNCG )
Web Site:
Robert G. Eason

Abstract: The purpose of this investigation was to study the underlying physiological processes involved in the evoked potential to patterned visual stimulation. Specifically, the study was designed to assess the role of the photopic and scotopic visual systems as mediatory processes subserving occipitally elicited potentials to a series of checkerboard patterns. In addition, it was hoped that the research would provide further information with respect to the hypothetical mechanisms of lateral inhibition and receptive field size and their contribution to complex visual processes. Six subjects participated in the experiment. Evoked potentials were recorded to a series of patterned stimuli that were illuminated with red and blue flashes presented to central and peripheral retinal sites against high and low levels of background luminance. Statistical analysis of the data revealed significant relations between evoked potential amplitude and the main effects of background, site, and check-size. Amplitude was also significantly related to the interaction effects of background x site, check-size x background, check-size x color, and site x color x background. Discussion of the results was in terms of the differential functional behavior of photopic and scotopic visual processes. Several comments were directed to the possible importance of lateral inhibition and receptive field size in the generation of these data.

Additional Information

Language: English
Date: 1969
Visual evoked response
Evoked potentials (Electrophysiology)

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