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Keyword: visual processing ×Clear all

2 claims from 1 paper

1. Neuroscience › Neurobiology of Language and Bilingualism

   Common Blood Flow Changes across Visual Tasks: II. Decreases in Cerebral Cortex

   Shulman, Fiez, Corbetta et al. · Journal of Cognitive Neuroscience · 1997

   Reanalysing nine PET studies of visual processing, the authors looked at which brain areas consistently show blood flow decreases during active tasks compared with passive viewing.

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   1. UncheckedBlood flow drops during active visual tasks, relative to fixation, were larger in some brain areas for language tasks and in another for nonlanguage tasks.“Decreases were more pronounced in the posterior cingulate/precuneous (BAS 31/7) and right inferior parietal cortex (BA 40) during language-related tasks and more pronounced in left inferior frontal cortex (BA 10/47) during nonlanguage tasks.”
   2. UncheckedBlood flow decreases rarely differed between active tasks in one experiment, though verb generation and reading differed in some brain areas.“Blood flow decreases did not generally show significant differences across the active task states within an experiment, but a verb-generation task produced larger decreases than a read task in right and left inferior parietal lobe (BA 40) and the posterior cingulate/precuneous (BA 31/7), while the…”