The primate retina contains two types of ganglion cells, with high and low contrast sensitivity
Ehud Kaplan,Robert Shapley +1 more
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It is reported that the parallel analysis of color and luminance in the visual scene begins in the retina, probably at a retinal site distal to the ganglion cells.Abstract:
Previously, we discovered that the broadband cells in the two magnocellular (large cell) layers of the monkey lateral geniculate nucleus (LGN) are much more sensitive to luminance contrast than are the color-sensitive cells in the four parvocellular (small cell) layers. We now report that this large difference in contrast sensitivity is due not to LGN circuitry but to differences in sensitivity of the retinal ganglion cells that provide excitatory synaptic input to the LGN neurons. This means that the parallel analysis of color and luminance in the visual scene begins in the retina, probably at a retinal site distal to the ganglion cells.read more
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Segregation of form, color, movement, and depth: anatomy, physiology, and perception
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Pathways for motion analysis: Cortical connections of the medial superior temporal and fundus of the superior temporal visual areas in the macaque
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The role of the parahippocampal cortex in cognition
TL;DR: The synthesis presented expands the implications of the proposed account of the parahippocampal cortex, gives rise to new and general questions about context and cognition, and reconciles a vast breadth of literature.
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Luminance and chromatic modulation sensitivity of macaque ganglion cells and human observers.
TL;DR: The data suggest strongly that the cells of the M-pathway form the physiological substrate for detection of luminance modulation and the Cells of the P- pathway the substrate for Detection of chromatic modulation, however, at high light levels, intrusion of a so-called luminance mechanism near 10 Hz in psychophysical detection ofchromatic modulation is probably due to responses in the M -pathway.
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Receptive fields of P and M ganglion cells across the primate retina
Lisa J. Croner,Ehud Kaplan +1 more
TL;DR: Constant gain of P cells across the visual field is achieved by increasing sensitivity to stimuli falling on the peripheral retina to an extent that counteracts the aberrations introduced by the eye's optics.
References
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Journal ArticleDOI
Sustained and transient neurones in the cat's retina and lateral geniculate nucleus.
TL;DR: Cat retinal ganglion cells may be subdivided into sustained and transient response‐types by the application of a battery of simple tests based on responses to standing contrast, fine grating patterns, size and speed of contrasting targets, and on the presence or absence of the periphery effect.
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Spatial and temporal contrast sensitivities of neurones in lateral geniculate nucleus of macaque.
TL;DR: The discharges of single neurones in the parvocellular and magnocellular laminae of the macaque's lateral geniculate nucleus were recorded with glass‐insulated tungsten micro‐electrodes and linearity of spatial summation was examined.
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The contrast sensitivity of human colour vision to red‐green and blue‐yellow chromatic gratings.
TL;DR: Results show that, at low spatial frequencies below 0.5 cycles/deg, contrast sensitivity is greater to the chromatic gratings, consisting of two monochrome gratings added in antiphase, than to either monochromatic grating alone.
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Retinal ganglion cells that project to the dorsal lateral geniculate nucleus in the macaque monkey
V.H. Perry,R. Oehler,Alan Cowey +2 more
TL;DR: Comparing the results with those of comparable investigations on cats and rabbits shows a much clearer segregation of the terminal targets of different classes of ganglion cell in monkeys, the greatest difference being the absence in the monkey of a projection to the geniculate from gamma- and epsilon-like cells.
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X and Y cells in the lateral geniculate nucleus of macaque monkeys.
Ehud Kaplan,Robert Shapley +1 more
TL;DR: It is proposed that the magnocellular layers of the macaque monkey's l.g.n. may be homologous to the A and A1 layer of the cat's l.'s l.n., and the great difference in their properties suggests that they have different functions in vision.