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Components of the human frontoparietal network become responsive to the presentation of task relevant information at dissociable levels of abstraction
Authors:
HAMPSHIRE, A., DUNCAN, J. & OWEN, A. M.
Reference:
12th Annual Meeting of the Organization for Human Brain Mapping , S100
Year of publication:
2006
CBU number:
6485
Abstract:
Current models of working memory and focal attention converge upon the idea of an adaptable global system, distributed across a network of frontal and parietal brain regions. Here we examine how the human frontoparietal network selectively adapts to represent currently relevant information during a simple attentional task - monitoring for a target item in a series of non-targets. Across the whole frontoparietal network there is selective response to targets, in line with a global system for coding task-relevant inputs. At the same time, there are striking dissociations in response to non-targets; while ventrolateral frontal cortex responds just to the target, more dorsal/ anterior regions respond to all stimuli from the target category. The results show different degrees of target selectivity across different regions of the frontoparietal network.
