Color Vision, Cones, and Color-Coding in the Cortex

@article{Conway2009ColorVC,
  title={Color Vision, Cones, and Color-Coding in the Cortex},
  author={B. Conway},
  journal={The Neuroscientist},
  year={2009},
  volume={15},
  pages={274 - 290}
}
  • B. Conway
  • Published 2009
  • Biology, Medicine
  • The Neuroscientist
Color processing begins with the absorption of light by cone photoreceptors, and progresses through a series of hierarchical stages: Retinal signals carrying color information are transmitted through the lateral geniculate nucleus of the thalamus (LGN) up to the primary visual cortex (V1). [...] Key Method From V1, the signals are processed by the second visual area (V2); then by cells located in subcompartments (“globs”) within the posterior inferior temporal (PIT) cortex, a brain region that encompasses area…Expand
Color signals through dorsal and ventral visual pathways
  • B. Conway
  • Medicine, Psychology
  • Visual Neuroscience
  • 2013
TLDR
A hypothesis is advanced that the S-cone signals in color-computing areas are required to achieve a balanced neural representation of perceptual color space, whereas those in noncolor-areas provide a cue to illumination and confer sensitivity to the chromatic contrast generated by natural daylight. Expand
Representation of Perceptual Color Space in Macaque Posterior Inferior Temporal Cortex (the V4 Complex)
TLDR
The combined luminance/hue sensitivity of glob cells is predicted for neurons that can distinguish two colors of the same hue at different luminance levels, but glob cells showed a stronger correlation with the organization of CIELUV space. Expand
Visual Color and Form Perception
Color perception involves a processing stream that includes opsin-containing cones in the retina, color-opponent responses in the retinal ganglion cells, computations of color contrast in striateExpand
Neural Mechanism of Color Vision: Review
Color vision is one of the most important functions of visual system that has fundamental and considerable roles in visual data gathering, perceptual vision, visual information processing,Expand
Color coding in the cortex: a modified approach to bottom-up visual attention
TLDR
To model red-cyan and green-magenta double-opponent cells, this work implements a center-surround difference approach of the saliency-based visual attention model and elicited enhanced responses to color salient stimuli when compared to the classic ones at high statistical significance levels. Expand
Neurophysiological correlates of color vision: a model
tree-receptor theory of human color vision accounts for color matching. A bottom-up, non-linear model combining cone signals in six types of cone-opponent cells in the lateral geniculate nucleusExpand
Color Specificity in the Human V4 Complex – An fMRI Repetition Suppression Study
The hierarchy of color processing areas in the human brain starts from cone-opponent signals in the retina. Relayed by the lateral geniculate nucleus (LGN), color information arrives at the primaryExpand
Color Representation Is Retinotopically Biased but Locally Intermingled in Mouse V1
TLDR
The results suggest that functional organizations of color information are locally intermingled, but slightly biased depending on the retinotopic position in mouse V1, which is consistent with the distribution of retinal opsins. Expand
Interaction of “chromatic” and “achromatic” circuits in Drosophila color opponent processing
TLDR
Dm8 mediates a second step in UV/VIS color opponent processing in Drosophila by integrating input from all types of photoreceptors, and reveals that chromatic and achromatic circuitries of the fly visual system interact more extensively than previously thought. Expand
A new transformation of cone responses to opponent color responses
TLDR
A literature search produced 16 studies of cone responses LMS and 15 studies of spectral (i.e., ygb) opponent color chromatic responses, in terms of response wavelength peaks. Expand
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 147 REFERENCES
Spatial and Temporal Properties of Cone Signals in Alert Macaque Primary Visual Cortex
TLDR
By virtue of their specialized receptive fields, the neurons described here spatially transform the cone signals and represent the first stage in the visual system at which spatially opponent color calculations are made. Expand
Parallel colour-opponent pathways to primary visual cortex
TLDR
Direct recordings from LGN afferent axons in muscimol-inactivated V1 are reported and it is found that blue/yellow afferents terminated exclusively in superficial cortical layers 3B and 4A, whereas red/greenafferents were encountered only in deeper cortex, in lower layer 4C. Expand
Spatial Structure of Cone Inputs to Color Cells in Alert Macaque Primary Visual Cortex (V-1)
  • B. Conway
  • Psychology, Medicine
  • The Journal of Neuroscience
  • 2001
TLDR
Red–green (or red–cyan) cells, along with blue–yellow and black–white cells, establish three chromatic axes that are sufficient to describe all of color space. Expand
The spatial transformation of color in the primary visual cortex of the macaque monkey
TLDR
This work re-evaluated color processing in V1 by studying single-neuron responses to luminance and to equiluminant color patterns equated for cone contrast, and found that most color-luminance cells are spatial-frequency tuned, with approximately equal selectivity for chromatic and achromatic patterns. Expand
Colour tuning in human visual cortex measured with functional magnetic resonance imaging
TLDR
Functional magnetic resonance imaging is used to examine responses in the human brain to a large number of colours, suggesting that colour signals relevant for perception are encoded in a large population of neurons in areas V1 and V2. Expand
Cone inputs in macaque primary visual cortex.
TLDR
The conclusion that V1 color-luminance cells are double-opponent neurons, which are more sensitive to color boundaries than to areas of color and thereby could play an important role in color perception, is supported. Expand
Color contrast in macaque V1.
TLDR
The neural basis for spatial color contrast and temporal color contrast in primary visual cortex (V1) of the alert macaque is explored and the remarkable degree of specialization shown by cells in V1, especially that of the double-opponent color cells, is discussed. Expand
neural mechanisms of Color Vision
TLDR
Almost all color cells gave a bigger response to a color if it was preceded by an opposite color, suggesting that these cells also encode temporal color contrast, and color perception is likely to be influenced by this encoding. Expand
Spatial and chromatic interactions in the lateral geniculate body of the rhesus monkey.
TLDR
The opponent principle, in which spatially separated excitatory and inhibitory regions are pitted against each other, has now been observed for retinal ganglion cells in the frog, the lizard, the rabbit, the rat, the ground squirrel, and the monkey. Expand
The 'blue-on' opponent pathway in primate retina originates from a distinct bistratified ganglion cell type
TLDR
The results thus demonstrate an anatomically distinct pathway that conveys S-cone signals to the brain, and the morphology of the blue-on cell suggests a novel hypothesis for the retinal circuitry underlying the blue–yellow opponent response. Expand
...
1
2
3
4
5
...