منابع مشابه
The attentional 'spotlight's' penumbra: center-surround modulation in striate cortex.
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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The intrinsic functional architecture of early cortical areas in highly visual mammals is characterized by the presence of domains and pinwheels, with orientation preference of the inputs to these regions being more and less selective, respectively. We exploited this organizational feature to investigate mechanisms supporting extraclassical surround suppression, a process thought to be critical...
متن کاملSuppressive effects of receptive field surround on neuronal activity in the cat primary visual cortex.
Effects of sinusoidal grating stimulus presented outside the classical receptive field (CRF) on neuronal responses were studied in the primary visual cortex of anaesthetized cats. Among 101 cells electrophysiologically recorded, the predominant effect of the stimulus in the receptive field surround (SRF) was the suppression of responses to the CRF stimulation, and the SRF grating suppressed the...
متن کاملResponse facilitation from the "suppressive" receptive field surround of macaque V1 neurons.
In primary visual cortex (V1), neuronal responses to optimally oriented stimuli in the receptive field (RF) center are usually suppressed by iso-oriented stimuli in the RF surround. The mechanisms and pathways giving rise to surround modulation, a possible neural correlate of perceptual figure-ground segregation, are not yet identified. We previously proposed that highly divergent and fast-cond...
متن کاملAttentional window and attentional capture 1 THE SIZE OF AN ATTENTIONAL WINDOW MODULATES ATTENTIONAL CAPTURE BY COLOR SINGLETONS
It has been proposed that during visual search a color singleton cannot capture attention in a bottom-up fashion (Jonides & Yantis, 1988). In the present study we manipulated the size of the attentional window by asking participants to detect either a global (diffuse attention) or a local shape (focused attention) before starting the search for a non-singleton target. We demonstrate that increa...
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ژورنال
عنوان ژورنال: Journal of Vision
سال: 2015
ISSN: 1534-7362
DOI: 10.1167/15.12.1261