Map location affects center-surround modulation in a network model of V1
نویسندگان
چکیده
منابع مشابه
Contrast-dependence of surround suppression in Macaque V1: Experimental testing of a recurrent network model
Neuronal responses in primary visual cortex (V1) to optimally oriented high-contrast stimuli in the receptive field (RF) center are suppressed by stimuli in the RF surround, but can be facilitated when the RF center is stimulated at low contrast. The neural circuits and mechanisms for surround modulation are still unknown. We previously proposed that topdown feedback connections mediate suppres...
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Firing of V1 cells in response to test stimuli shown in the classical discharge "eld is highly dependent on the spatial context (orientation/contrast center-surround gradients) in which they are embedded. Here, we present a preliminary study of a large-scale detailed model constrained by physiological and psychophysical data which accounts for the modulatory e!ects induced by the concomitant st...
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We investigated the spatial organization of surround suppression in primate primary visual cortex (V1). We utilized drifting stimuli, configured to extend either from within the classical receptive field (CRF) to surrounding visual space, or from surrounding visual space into the CRF or subdivided to generate direction contrast, to make a detailed examination of the strength, spatial organizati...
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By enhancing neural activity in respective retinotopic cortical representations attention increases the efficiency with which visual information at a selected location is processed. Behavioral data also suggest that information from the vicinity of the attended region is actively suppressed. In search for a physiological correlate of this 'spotlight's penumbra' we assessed neural responses in r...
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ژورنال
عنوان ژورنال: BMC Neuroscience
سال: 2009
ISSN: 1471-2202
DOI: 10.1186/1471-2202-10-s1-p179