Luminance-contrast mechanisms in humans: visual evoked potentials and a nonlinear model.

Luminance-contrast mechanisms in humans: visual evoked potentials and a nonlinear model. Research Abstract Details 

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Luminance-contrast mechanisms in humans: visual evoked potentials and a nonlinear model. Abstract Text:

Vance Zemon,James Gordon,

Isolated-checks were luminance-modulated temporally to elicit VEPs. Bright or dark checks were used to drive ON or OFF pathways, and low or high-contrast conditions were used to emphasize activity from magnocellular or parvocellular pathways. Manipulation of stimulus parameters and frequency analysis of the VEP were performed to obtain spatial and contrast-response functions. A biophysical explanation is offered for why the opposite polarity stimuli drive selectively ON and OFF pathways in primary visual cortex, and a lumped biophysical model is proposed to quantify the data and characterize changes in the dynamics of the system with contrast given a limited number of parameters. Response functions were found to match the characteristics of the targeted pathways.

Luminance-contrast mechanisms in humans: visual evoked potentials and a nonlinear model. Publishing Authors By Initials

V Zemon,J Gordon,

For similar psychological phenomena and processes: mental processes: perception: visual perception research abstracts see: psychological phenomena and processes: mental processes: perception: visual perception research

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Luminance-contrast mechanisms in humans: visual evoked potentials and a nonlinear model. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Vision research

VOLUME: 46

Page Numbers: 4163-80

Journal Abbreviation: Vision Res.

ISSN: 0042-6989

DAY: 25

MONTH: 09

YEAR: 2006

Luminance-contrast mechanisms in humans: visual evoked potentials and a nonlinear model. Information

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LANGUAGE: eng

NlmUniqueID: 417402

Luminance-contrast mechanisms in humans: visual evoked potentials and a nonlinear model. Keywords Mesh Terms:

KEYWORDS: Visual Perception

MESH TERMS: physiology

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Grant and Affiliation Information for Luminance-contrast mechanisms in humans: visual evoked potentials and a nonlinear model.

AFFILIATION: Ferkauf Graduate School of Psychology, Yeshiva University, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Bronx, NY 10461, USA. vepman@aol.com

Country: England

AGENCY: United States NEI

GRANT: EY02439

ACRONYM: EY

MEDLINETA: Vision Res

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