Contextual signals in visual cortex
نویسندگان
چکیده
منابع مشابه
Contextual modulation of primary visual cortex by auditory signals
Early visual cortex receives non-feedforward input from lateral and top-down connections (Muckli & Petro 2013 Curr. Opin. Neurobiol. 23, 195-201. (doi:10.1016/j.conb.2013.01.020)), including long-range projections from auditory areas. Early visual cortex can code for high-level auditory information, with neural patterns representing natural sound stimulation (Vetter et al. 2014 Curr. Biol. 24, ...
متن کاملContextual modulation in primary visual cortex.
We studied extra-receptive field contextual modulation in area V1 of awake, behaving macaque monkeys. Contextual modulation was studied using texture displays in which texture covering the receptive field (RF) was the same in all trials, but the perceptual context of this texture could vary depending on the configuration of extra-RF texture elements. We found robust contextual modulation when d...
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Orientation selective cortical neurons show contrast-invariant orientation tuning curves, contrast saturation and contrast adaptation. Additionally, their responses are modulated by oriented stimuli outside the classical receptive eld. We characterize the extent, to which these eeects can be caused by a recurrent network of simple neurons, and which properties are probably due to plasticity of ...
متن کاملContextual modulation in primary visual cortex of macaques.
Recent studies have suggested that V1 neurons extract figures from their backgrounds, in that they respond better to interior features of figures than to equivalent features of background stimuli. This is reportedly true even when the figure boundaries are distant from the borders of the classical receptive field (RF). To test the role of V1 neurons in figure-ground segregation, we recorded the...
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Two components of cortical circuits could mediate contour integration in primary visual cortex (V1): intrinsic horizontal connections and feedback from higher cortical areas. To distinguish between these, we combined functional mapping with a new technique for labeling axons, a recombinant adenovirus bearing the gene for green fluorescent protein (GFP), to determine the extent, density, and ori...
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ژورنال
عنوان ژورنال: Current Opinion in Neurobiology
سال: 2018
ISSN: 0959-4388
DOI: 10.1016/j.conb.2018.05.003