“School of Cognitive Sciences”
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| Paper IPM / Cognitive Sciences / 14962 |
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Changes in the correlations between neurons are powerful mechanisms for altering visual cortical representations. Previous studies of the effect of topdown signals, such as attention, on correlations in visual cortex have all examined changes in visually evoked responses. To obtain a fuller understanding of how top-down input modulates correlated activity in extrastriate visual cortex, we investigated the changes in correlated activity produced by a top-down working memory signal both in isolation and in combination with bottom-up visual input. We simultaneously recorded the responses of multiple neurons in the middle temporal (MT) area of two macaque monkeys using 16-channel linear array electrodes during the memory guided saccade (MGS) task. In this task the animal had to remember the location of a target and maintain...
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