Direct neurophysiological measurement of surround suppression in humans
نویسندگان
چکیده
منابع مشابه
Direct electrophysiological metrics of visual surround suppression in humans
Surround suppression is a well known phenomenon whereby the perceived intensity of a stimulus is lowered by the relative intensity of its surroundings. Psychophysical work has demonstrated the influence of a variety of stimulus factors, including similarity of features between the “foreground” (center) and “background” (surround). Such behavioral indices have provided novel insights in clinical...
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Surround suppression is a well-known example of contextual interaction in visual cortical neurophysiology, whereby the neural response to a stimulus presented within a neuron's classical receptive field is suppressed by surrounding stimuli. Human psychophysical reports present an obvious analog to the effects seen at the single-neuron level: stimuli are perceived as lower-contrast when embedded...
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The apparent contrast of a central stimulus is affected by the presence of surrounding stimuli. For some stimulus conditions, the apparent contrast is suppressed and for other conditions the apparent contrast is enhanced. This report is intended to offer a coherent description of the stimulus factors that influence suppression and enhancement. Using a contrast-matching protocol, we measured the...
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Compared to unaffected observers patients with schizophrenia (SZ) show characteristic differences in visual perception, including a reduced susceptibility to the influence of context on judgments of contrast - a manifestation of weaker surround suppression (SS). To examine the generality of this phenomenon we measured the ability of 24 individuals with SZ to judge the luminance, contrast, orien...
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ژورنال
عنوان ژورنال: Journal of Vision
سال: 2014
ISSN: 1534-7362
DOI: 10.1167/14.10.50