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 language | English (US) |
|---|---|
| Journal | i-Perception |
| Volume | 9 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jan 1 2018 |
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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 journal › Article
}
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 -