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Related Experiment Video

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Stimulus-specific Cortical Visual Evoked Potential Morphological Patterns

Stimulus-specific Cortical Visual Evoked Potential Morphological Patterns

Published on: May 12, 2019

Cortical Double-Opponent Cells in Color Perception: Perceptual Scaling and Chromatic Visual Evoked Potentials.

Valerie Nunez¹, Robert M Shapley², James Gordon³

¹Center for Neural Science, New York University, New York, NY, USA; Department of Psychology, Hunter College, CUNY, New York, NY, USA.

|January 30, 2018

Summary

Double-opponent cells significantly contribute to color perception and visual evoked potentials (cVEP) in the early visual cortex (V1). Their involvement is crucial for pattern color saturation and may influence cortical color coding dynamics.

Keywords:

V1 chromatic visual evoked potential color perception cone contrast saturation

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Area of Science:

Neuroscience
Visual Perception
Computational Neuroscience

Background:

The early visual cortex (V1) utilizes single-opponent and double-opponent cells for color processing.
Understanding the distinct roles of these neural substrates is crucial for comprehending color perception.

Purpose of the Study:

To investigate the relative contributions of single-opponent and double-opponent cells to color perception.
To determine the involvement of these cell types in chromatic visual evoked potentials (cVEP).

Main Methods:

Perceptual scaling of color saturation using equiluminant checkerboard and uniform square patterns at varying cone contrasts.
Measurement of chromatic visual evoked potentials (cVEP) using the same stimuli.

Main Results:

Perceived color saturation was higher for checkerboard patterns compared to uniform squares, suggesting double-opponent cell involvement.
Checkerboard stimuli elicited significantly larger cVEPs than uniform squares, indicating double-opponent cell contribution to cVEP.
The 6-Hz Fourier component of cVEP power scaled linearly with contrast, mirroring saturation perception.

Conclusions:

Double-opponent cells play a significant role in the color perception of patterns.
Double-opponent cells contribute to the cVEP response.
Cortical color coding may depend on response dynamics, particularly the 6-Hz component related to saturation perception.