From: Wade T. Smith (wade.t.smith@verizon.net)
Date: Wed 09 Jul 2003 - 18:27:01 GMT
http://archneur.ama-assn.org/cgi/content/full/60/6/809
It has been put forward that the prefrontal cortex has a central role
in maintaining and manipulating the processing of visual information
for memory. This executive process comprises the enhancement of
relevant information processing and the inhibition of irrelevant
processing. The primary visual cortex receives feedback from
extrastriatal, parietal lobe, and temporal lobe areas, but not directly
from prefrontal areas. Therefore, if the prefrontal cortex has a
central role in memory retention, the modulated neural activity in the
primary visual cortex during the retention period derives indirectly
from the prefrontal cortex through multiple stages of feedback
processing. This suggests that the mechanism underlying working memory
is not a localized phenomenon but a distributed process, covering the
full extent of the cortical visual system.
(I do not have access to the full text.)
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