Cited by 62Visual perception and processing mechanismsColor Science and ApplicationsMultisensory perception and integration

Color responses of the human lateral geniculate nucleus: selective amplification of S-cone signals between the lateral geniculate nucleno and primary visual cortex measured with high-field fMRI

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Mullen, Kathy T., Dumoulin, Serge O., Hess, Robert F.·2008·European Journal of Neuroscience

Abstract

The lateral geniculate nucleus (LGN) is the primary thalamic nucleus that relays visual information from the retina to the primary visual cortex (V1) and has been extensively studied in non-human primates. A key feature of the LGN is the segregation of retinal inputs into different cellular layers characterized by their differential responses to red-green (RG) color (L/M opponent), blue-yellow (BY) color (S-cone opponent) and achromatic (Ach) contrast. In this study we use high-field functional magnetic resonance imaging (4 tesla, 3.6 x 3.6 x 3 mm(3)) to record simultaneously the responses of the human LGN and V1 to chromatic and Ach contrast to investigate the LGN responses to color, and how these are modified as information transfers between LGN and cortex. We find that the LGN has a robust response to RG color contrast, equal to or greater than the Ach response, but a significantly poorer sensitivity to BY contrast. In V1 at low temporal rates (2 Hz), however, the sensitivity of the BY color pathway is selectively enhanced, rising in relation to the RG and Ach responses. We find that this effect generalizes across different stimulus contrasts and spatial stimuli (1-d and 2-d patterns), but is selective for temporal frequency, as it is not found for stimuli at 8 Hz. While the mechanism of this cortical enhancement of BY color vision and its dynamic component is unknown, its role may be to compensate for a weak BY signal originating from the sparse distribution of neurons in the retina and LGN.

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  • It is possible to cover a wide visual field with an overrepresentation of the foveal region using LGN prostheses, thus restoring possibly high-acuity artificial vision.

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Authors
Mullen, K. T., Dumoulin, S. O., & Hess, R. F.
Affiliations
  • McGill University (CA)
  • Utrecht University (NL)
  • Queensland University of Technology (AU)
Corresponding author
Mullen, Kathy T.
Venue
European Journal of Neuroscience
Publisher
Wiley
Published
2008-10-27
Volume
28
Issue
9
Pages
1911-1923
ISSN
  • 0953-816X (ISSN-L)
  • 1460-9568
OpenAlex
W2159635141
Cited by
62
References
63
Citations by year
2026: 4 · 2025: 2 · 2024: 4 · 2022: 7 · 2021: 2 · 2020: 1 · 2019: 3 · 2018: 3 · 2017: 1 · 2016: 4 · 2015: 3 · 2014: 2 · 2013: 5 · 2012: 2
FWCI
3.27
Type
journal article
Language
en
Update notices
erratum (2008-11-24)
Open access
Locations
  • European Journal of Neuroscience (publishedVersion)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
  • Queensland University of Technology
  • Canadian Institutes of Health Research (10819, 53346, MOP53346, MOP 10819)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Visual perception and processing mechanisms
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Color Science and Applications
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Multisensory perception and integration
Keywords
lateral geniculate nucleus, primary visual cortex, achromatic contrast, color vision, temporal frequency sensitivity, high-field fMRI, human visual system
MeSH terms
Action Potentials, Adult, Female, Geniculate Bodies, Humans, Magnetic Resonance Imaging, Male, Middle Aged, Photic Stimulation, Space Perception, Time Factors, Vision, Ocular, Visual Cortex, Visual Pathways, Contrast Sensitivity, Retinal Cone Photoreceptor Cells, Color Vision

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