Journal article

Dynamics of coherent activity between cortical areas defines a two-stage process of selective attention

E Levichkina, M Kermani, YB Saalmann, TR Vidyasagar

Cold Spring Harbor Laboratory


ABSTRACTAnalysing a visual scene requires the brain to briefly keep in memory potentially relevant parts and then direct attention to their locations for detailed processing. To reveal the neuronal basis of the underlying working memory and top-down attention processes, we trained macaques to match two patterns presented with a delay between them. As the above processes are likely to require communication between brain regions, and the parietal cortex is involved in spatial attention, we simultaneously recorded neuronal activities from the interconnected parietal and middle temporal areas. We found that mnemonic information about the first pattern was retained in coherent oscillating activit..

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