what comes in....

From: Wade T. Smith (wade.t.smith@verizon.net)
Date: Wed 09 Jul 2003 - 18:27:01 GMT

  • Next message: Wade T. Smith: "extracts from 'From sensation to cognition' M.-Marsel Mesulam"


    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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