Cortical double-opponent cells in color perception: Perceptual scaling and chromatic visual evoked potentials

Valerie Nunez, Robert Shapley, James Gordon

Research output: Contribution to journalArticle

Abstract

In the early visual cortex V1, there are currently only two known neural substrates for color perception: single-opponent and double-opponent cells. Our aim was to explore the relative contributions of these neurons to color perception. We measured the perceptual scaling of color saturation for equiluminant color checkerboard patterns (designed to stimulate double-opponent neurons preferentially) and uniformly colored squares (designed to stimulate only single-opponent neurons) at several cone contrasts. The spatially integrative responses of single-opponent neurons would produce the same response magnitude for checkerboards as for uniform squares of the same space-averaged cone contrast. However, perceived saturation of color checkerboards was higher than for the corresponding squares. The perceptual results therefore imply that double-opponent cells are involved in color perception of patterns. We also measured the chromatic visual evoked potential (cVEP) produced by the same stimuli; checkerboard cVEPs were much larger than those for corresponding squares, implying that double-opponent cells also contribute to the cVEP response. The total Fourier power of the cVEP grew sublinearly with cone contrast. However, the 6-Hz Fourier component’s power grew linearly with contrast-like saturation perception. This may also indicate that cortical coding of color depends on response dynamics.

Original languageEnglish (US)
Journali-Perception
Volume9
Issue number1
DOIs
StatePublished - Jan 1 2018

Fingerprint

Color Perception
Visual Evoked Potentials
Bioelectric potentials
Color
Neurons
Cones
Visual Cortex
Dynamic response
Substrates

Keywords

  • Chromatic visual evoked potential
  • Color perception
  • Cone contrast
  • Saturation
  • V1

ASJC Scopus subject areas

  • Experimental and Cognitive Psychology
  • Sensory Systems
  • Artificial Intelligence

Cite this

Cortical double-opponent cells in color perception : Perceptual scaling and chromatic visual evoked potentials. / Nunez, Valerie; Shapley, Robert; Gordon, James.

In: i-Perception, Vol. 9, No. 1, 01.01.2018.

Research output: Contribution to journalArticle

@article{f7ff09686d0544c7ab848356c1103286,
title = "Cortical double-opponent cells in color perception: Perceptual scaling and chromatic visual evoked potentials",
abstract = "In the early visual cortex V1, there are currently only two known neural substrates for color perception: single-opponent and double-opponent cells. Our aim was to explore the relative contributions of these neurons to color perception. We measured the perceptual scaling of color saturation for equiluminant color checkerboard patterns (designed to stimulate double-opponent neurons preferentially) and uniformly colored squares (designed to stimulate only single-opponent neurons) at several cone contrasts. The spatially integrative responses of single-opponent neurons would produce the same response magnitude for checkerboards as for uniform squares of the same space-averaged cone contrast. However, perceived saturation of color checkerboards was higher than for the corresponding squares. The perceptual results therefore imply that double-opponent cells are involved in color perception of patterns. We also measured the chromatic visual evoked potential (cVEP) produced by the same stimuli; checkerboard cVEPs were much larger than those for corresponding squares, implying that double-opponent cells also contribute to the cVEP response. The total Fourier power of the cVEP grew sublinearly with cone contrast. However, the 6-Hz Fourier component’s power grew linearly with contrast-like saturation perception. This may also indicate that cortical coding of color depends on response dynamics.",
keywords = "Chromatic visual evoked potential, Color perception, Cone contrast, Saturation, V1",
author = "Valerie Nunez and Robert Shapley and James Gordon",
year = "2018",
month = "1",
day = "1",
doi = "10.1177/2041669517752715",
language = "English (US)",
volume = "9",
journal = "i-Perception",
issn = "2041-6695",
publisher = "Pion Ltd.",
number = "1",

}

TY - JOUR

T1 - Cortical double-opponent cells in color perception

T2 - Perceptual scaling and chromatic visual evoked potentials

AU - Nunez, Valerie

AU - Shapley, Robert

AU - Gordon, James

PY - 2018/1/1

Y1 - 2018/1/1

N2 - In the early visual cortex V1, there are currently only two known neural substrates for color perception: single-opponent and double-opponent cells. Our aim was to explore the relative contributions of these neurons to color perception. We measured the perceptual scaling of color saturation for equiluminant color checkerboard patterns (designed to stimulate double-opponent neurons preferentially) and uniformly colored squares (designed to stimulate only single-opponent neurons) at several cone contrasts. The spatially integrative responses of single-opponent neurons would produce the same response magnitude for checkerboards as for uniform squares of the same space-averaged cone contrast. However, perceived saturation of color checkerboards was higher than for the corresponding squares. The perceptual results therefore imply that double-opponent cells are involved in color perception of patterns. We also measured the chromatic visual evoked potential (cVEP) produced by the same stimuli; checkerboard cVEPs were much larger than those for corresponding squares, implying that double-opponent cells also contribute to the cVEP response. The total Fourier power of the cVEP grew sublinearly with cone contrast. However, the 6-Hz Fourier component’s power grew linearly with contrast-like saturation perception. This may also indicate that cortical coding of color depends on response dynamics.

AB - In the early visual cortex V1, there are currently only two known neural substrates for color perception: single-opponent and double-opponent cells. Our aim was to explore the relative contributions of these neurons to color perception. We measured the perceptual scaling of color saturation for equiluminant color checkerboard patterns (designed to stimulate double-opponent neurons preferentially) and uniformly colored squares (designed to stimulate only single-opponent neurons) at several cone contrasts. The spatially integrative responses of single-opponent neurons would produce the same response magnitude for checkerboards as for uniform squares of the same space-averaged cone contrast. However, perceived saturation of color checkerboards was higher than for the corresponding squares. The perceptual results therefore imply that double-opponent cells are involved in color perception of patterns. We also measured the chromatic visual evoked potential (cVEP) produced by the same stimuli; checkerboard cVEPs were much larger than those for corresponding squares, implying that double-opponent cells also contribute to the cVEP response. The total Fourier power of the cVEP grew sublinearly with cone contrast. However, the 6-Hz Fourier component’s power grew linearly with contrast-like saturation perception. This may also indicate that cortical coding of color depends on response dynamics.

KW - Chromatic visual evoked potential

KW - Color perception

KW - Cone contrast

KW - Saturation

KW - V1

UR - http://www.scopus.com/inward/record.url?scp=85041424411&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85041424411&partnerID=8YFLogxK

U2 - 10.1177/2041669517752715

DO - 10.1177/2041669517752715

M3 - Article

AN - SCOPUS:85041424411

VL - 9

JO - i-Perception

JF - i-Perception

SN - 2041-6695

IS - 1

ER -