Increased activity in human visual cortex during directed attention in the absence of visual stimulation. Kastner, S, Pinsk, M A, De Weerd, P, Desimone, R, & Ungerleider, L G Neuron, 22(4):751–761, 1999. Place: UNITED STATES ISBN: 0896-6273abstract bibtex When subjects direct attention to a particular location in a visual scene, responses in the visual cortex to stimuli presented at that location are enhanced, and the suppressive influences of nearby distractors are reduced. What is the top-down signal that modulates the response to an attended versus an unattended stimulus? Here, we demonstrate increased activity related to attention in the absence of visual stimulation in extrastriate cortex when subjects covertly directed attention to a peripheral location expecting the onset of visual stimuli. Frontal and parietal areas showed a stronger signal increase during this expectation than did visual areas. The increased activity in visual cortex in the absence of visual stimulation may reflect a top-down bias of neural signals in favor of the attended location, which derives from a fronto-parietal network.
@article{kastner_increased_1999,
title = {Increased activity in human visual cortex during directed attention in the absence of visual stimulation.},
volume = {22},
abstract = {When subjects direct attention to a particular location in a visual scene, responses in the visual cortex to stimuli presented at that location are enhanced, and the suppressive influences of nearby distractors are reduced. What is the top-down signal that modulates the response to an attended versus an unattended stimulus? Here, we demonstrate increased activity related to attention in the absence of visual stimulation in extrastriate cortex when subjects covertly directed attention to a peripheral location expecting the onset of visual stimuli. Frontal and parietal areas showed a stronger signal increase during this expectation than did visual areas. The increased activity in visual cortex in the absence of visual stimulation may reflect a top-down bias of neural signals in favor of the attended location, which derives from a fronto-parietal network.},
language = {eng},
number = {4},
journal = {Neuron},
author = {Kastner, S and Pinsk, M A and De Weerd, P and Desimone, R and Ungerleider, L G},
year = {1999},
pmid = {10230795},
note = {Place: UNITED STATES
ISBN: 0896-6273},
keywords = {Attention, Brain Mapping, Frontal Lobe, Humans, Parietal Lobe, Photic Stimulation, Visual Cortex, comparative study, research support, non-u.s. gov't},
pages = {751--761},
}
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