Color signals in human motion-selective cortex

Brian A. Wandell; Allen B. Poirson; William T. Newsome; Heidi A. Baseler; Geoffrey M. Boynton; Alex Huk; Sunil Gandhi; Lindsay T. Sharpe

doi:10.1016/S0896-6273(00)81037-5

Color signals in human motion-selective cortex

Brian A. Wandell, Allen B. Poirson, William T. Newsome, Heidi A. Baseler, Geoffrey M. Boynton, Alex Huk, Sunil Gandhi, Lindsay T. Sharpe

The Hull York Medical School

Research output: Contribution to journal › Article › peer-review

Abstract

The neural basis for the effects of color and contrast on perceived speed was examined using functional magnetic resonance imaging (fMRI). Responses to S cone (blue-yellow) and L + M cone (luminance) patterns were measured in area V1 and in the motion area MT+. The MT+ responses were quantitatively similar to perceptual speed judgments of color patterns but not to color detection measures. We also measured cortical motion responses in individuals lacking L and M cone function (S cone monochromats). The S cone monochromats have clear motion-responsive regions in the conventional MT+ position, and their contrast-response functions there have twice the responsivity of S cone contrast-response functions in normal controls. But, their responsivity is far lower than the normals' responsivity to luminance contrast. Thus, the powerful magnocellular input to MT+ is either weak or silent during photopic vision in S cone monochromats.

Original language	English
Pages (from-to)	901-909
Number of pages	9
Journal	Neuron
Volume	24
Issue number	4
DOIs	https://doi.org/10.1016/S0896-6273(00)81037-5
Publication status	Published - Dec 1999

Keywords

Adaptation, Ocular
Adolescent
Adult
Color
Color Perception
Female
Humans
Magnetic Resonance Imaging
Male
Motion Perception
Neuronal Plasticity
Photic Stimulation
Retinal Cone Photoreceptor Cells
Visual Cortex

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10.1016/S0896-6273(00)81037-5

Cite this

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title = "Color signals in human motion-selective cortex",

abstract = "The neural basis for the effects of color and contrast on perceived speed was examined using functional magnetic resonance imaging (fMRI). Responses to S cone (blue-yellow) and L + M cone (luminance) patterns were measured in area V1 and in the motion area MT+. The MT+ responses were quantitatively similar to perceptual speed judgments of color patterns but not to color detection measures. We also measured cortical motion responses in individuals lacking L and M cone function (S cone monochromats). The S cone monochromats have clear motion-responsive regions in the conventional MT+ position, and their contrast-response functions there have twice the responsivity of S cone contrast-response functions in normal controls. But, their responsivity is far lower than the normals' responsivity to luminance contrast. Thus, the powerful magnocellular input to MT+ is either weak or silent during photopic vision in S cone monochromats.",

keywords = "Adaptation, Ocular, Adolescent, Adult, Color, Color Perception, Female, Humans, Magnetic Resonance Imaging, Male, Motion Perception, Neuronal Plasticity, Photic Stimulation, Retinal Cone Photoreceptor Cells, Visual Cortex",

author = "Wandell, {Brian A.} and Poirson, {Allen B.} and Newsome, {William T.} and Baseler, {Heidi A.} and Boynton, {Geoffrey M.} and Alex Huk and Sunil Gandhi and Sharpe, {Lindsay T.}",

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AU - Wandell, Brian A.

AU - Poirson, Allen B.

AU - Newsome, William T.

AU - Baseler, Heidi A.

AU - Boynton, Geoffrey M.

AU - Huk, Alex

AU - Gandhi, Sunil

AU - Sharpe, Lindsay T.

PY - 1999/12

Y1 - 1999/12

N2 - The neural basis for the effects of color and contrast on perceived speed was examined using functional magnetic resonance imaging (fMRI). Responses to S cone (blue-yellow) and L + M cone (luminance) patterns were measured in area V1 and in the motion area MT+. The MT+ responses were quantitatively similar to perceptual speed judgments of color patterns but not to color detection measures. We also measured cortical motion responses in individuals lacking L and M cone function (S cone monochromats). The S cone monochromats have clear motion-responsive regions in the conventional MT+ position, and their contrast-response functions there have twice the responsivity of S cone contrast-response functions in normal controls. But, their responsivity is far lower than the normals' responsivity to luminance contrast. Thus, the powerful magnocellular input to MT+ is either weak or silent during photopic vision in S cone monochromats.

AB - The neural basis for the effects of color and contrast on perceived speed was examined using functional magnetic resonance imaging (fMRI). Responses to S cone (blue-yellow) and L + M cone (luminance) patterns were measured in area V1 and in the motion area MT+. The MT+ responses were quantitatively similar to perceptual speed judgments of color patterns but not to color detection measures. We also measured cortical motion responses in individuals lacking L and M cone function (S cone monochromats). The S cone monochromats have clear motion-responsive regions in the conventional MT+ position, and their contrast-response functions there have twice the responsivity of S cone contrast-response functions in normal controls. But, their responsivity is far lower than the normals' responsivity to luminance contrast. Thus, the powerful magnocellular input to MT+ is either weak or silent during photopic vision in S cone monochromats.

KW - Adaptation, Ocular

KW - Adolescent

KW - Adult

KW - Color

KW - Color Perception

KW - Female

KW - Humans

KW - Magnetic Resonance Imaging

KW - Male

KW - Motion Perception

KW - Neuronal Plasticity

KW - Photic Stimulation

KW - Retinal Cone Photoreceptor Cells

KW - Visual Cortex

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DO - 10.1016/S0896-6273(00)81037-5

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