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Curr Opin Neurobiol. 1994 Apr;4(2):157-65.

'What' and 'where' in the human brain.

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  • 1National Institute of Mental Health, Bethesda.


Multiple visual areas in the cortex of nonhuman primates are organized into two hierarchically organized and functionally specialized processing pathways, a 'ventral stream' for object vision and a 'dorsal stream' for spatial vision. Recent findings from positron emission tomography activation studies have localized these pathways within the human brain, yielding insights into cortical hierarchies, specialization of function, and attentional mechanisms.

[PubMed - indexed for MEDLINE]
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