Cortical involvement in visual scan in the monkey |
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Authors: | R. Bruce Bolster Karl H. Pribram |
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Affiliation: | 1. University of Winnipeg, Winnipeg, Ontario, Canada 2. Stanford University, Stanford, California 3. Center for Brain Research and Informational Sciences, Radford University, Box 6977, 24142, Radford, VA
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Abstract: | Monkeys performed a visual search task for food reward. Green square targets were embedded in 3 × 3 arrays of colored forms. In distinct-feature arrays, all nontarget stimuli were red diamonds, whereas in shared-feature arrays, some nontarget stimuli shared either form (red square) or color (green diamond) with the target. Reaction time was slower for shared-feature arrays and linearly related to the number of shared-feature distractors. Errors were more common in shared-feature arrays, and shared-feature distractors were mistaken for targets more frequently than distinct-feature distractors. Event-related local field potentials were recorded from implanted transcortical electrodes. Significant task-related differences were obtained from association cortex, but not from projection cortex. Results are discussed in terms of the relative contribution of inferotem-poral, |
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