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• W1996402597 endingPage "e1000754" @default.
• W1996402597 startingPage "e1000754" @default.
• W1996402597 abstract "Primary visual cortex is often viewed as a cyclopean retina, performing the initial encoding of binocular disparities between left and right images. Because the eyes are set apart horizontally in the head, binocular disparities are predominantly horizontal. Yet, especially in the visual periphery, a range of non-zero vertical disparities do occur and can influence perception. It has therefore been assumed that primary visual cortex must contain neurons tuned to a range of vertical disparities. Here, I show that this is not necessarily the case. Many disparity-selective neurons are most sensitive to changes in disparity orthogonal to their preferred orientation. That is, the disparity tuning surfaces, mapping their response to different two-dimensional (2D) disparities, are elongated along the cell's preferred orientation. Because of this, even if a neuron's optimal 2D disparity has zero vertical component, the neuron will still respond best to a non-zero vertical disparity when probed with a sub-optimal horizontal disparity. This property can be used to decode 2D disparity, even allowing for realistic levels of neuronal noise. Even if all V1 neurons at a particular retinotopic location are tuned to the expected vertical disparity there (for example, zero at the fovea), the brain could still decode the magnitude and sign of departures from that expected value. This provides an intriguing counter-example to the common wisdom that, in order for a neuronal population to encode a quantity, its members must be tuned to a range of values of that quantity. It demonstrates that populations of disparity-selective neurons encode much richer information than previously appreciated. It suggests a possible strategy for the brain to extract rarely-occurring stimulus values, while concentrating neuronal resources on the most commonly-occurring situations." @default.
• W1996402597 created "2016-06-24" @default.
• W1996402597 creator A5060410206 @default.
• W1996402597 date "2010-04-22" @default.
• W1996402597 modified "2023-10-12" @default.
• W1996402597 title "Vertical Binocular Disparity is Encoded Implicitly within a Model Neuronal Population Tuned to Horizontal Disparity and Orientation" @default.
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• W1996402597 doi "https://doi.org/10.1371/journal.pcbi.1000754" @default.
• W1996402597 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2858673" @default.
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