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• W4302024634 abstract "Feature-based attention prioritizes the processing of the attended feature while strongly suppressing the processing of nearby ones. This creates a non-linearity or attentional suppressive surround predicted by the Selective Tuning model of visual attention. However, previously reported effects of feature-based attention on neuronal responses are linear, e.g., feature-similarity gain. Here, we investigated this apparent contradiction by neurophysiological and psychophysical approaches.Responses of motion direction-selective neurons in area MT/MST of monkeys were recorded during a motion task. When attention was allocated to a stimulus moving in the neurons' preferred direction, response tuning curves showed its minimum for directions 60-90° away from the preferred direction, an attentional suppressive surround. This effect was modeled via the interaction of two Gaussian fields representing excitatory narrowly tuned and inhibitory widely tuned inputs into a neuron, with feature-based attention predominantly increasing the gain of inhibitory inputs. We further showed using a motion repulsion paradigm in humans that feature-based attention produces a similar non-linearity on motion discrimination performance.Our results link the gain modulation of neuronal inputs and tuning curves examined through the feature-similarity gain lens to the attentional impact on neural population responses predicted by the Selective Tuning model, providing a unified framework for the documented effects of feature-based attention on neuronal responses and behavior." @default.
• W4302024634 created "2022-10-06" @default.
• W4302024634 creator A5009123037 @default.
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• W4302024634 date "2022-10-05" @default.
• W4302024634 modified "2023-10-18" @default.
• W4302024634 title "Attention to visual motion suppresses neuronal and behavioral sensitivity in nearby feature space" @default.
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• W4302024634 doi "https://doi.org/10.1186/s12915-022-01428-7" @default.
• W4302024634 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36199136" @default.
• W4302024634 hasPublicationYear "2022" @default.
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