Journal
SCIENCE
Volume 291, Issue 5508, Pages 1560-1563Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1055465
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In crowded visual scenes, attention is needed to select relevant stimuli. To study the underlying mechanisms, we recorded neurons in cortical area V4 while macaque monkeys attended to behaviorally relevant stimuli and ignored distracters. Neurons activated by the attended stimulus showed increased gamma-frequency (35 to 90 hertz) synchronization but reduced low-frequency (<17 hertz) synchronization compared with neurons at nearby V4 sites activated by distracters. Because postsynaptic integration times;are short, these Localized changes in synchronization may serve to amplify behaviorally relevant signals in the cortex.
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