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fMRI Studies of Stroop Tasks Reveal Unique Roles of Anterior and Posterior Brain Systems
 

Summary: fMRI Studies of Stroop Tasks Reveal Unique
Roles of Anterior and Posterior Brain Systems
in Attentional Selection
Marie T. Banich, Michael P. Milham, Ruthann Atchley, Neal J. Cohen,
Andrew Webb, Tracey Wszalek, Arthur F. Kramer, Zhei-Pei Liang,
Alexander Wright, Joel Shenker, and Richard Magin
The Beckman Institute, University of Illinois at Urbana-Champaign
Abstract
& The brain's attentional system identifies and selects
information that is task-relevant while ignoring information
that is task-irrelevant. In two experiments using functional
magnetic resonance imaging, we examined the effects of
varying task-relevant information compared to task-irrelevant
information. In the first experiment, we compared patterns of
activation as attentional demands were increased for two
Stroop tasks that differed in the task-relevant information, but
not the task-irrelevant information: a color­word task and a
spatial­word task. Distinct subdivisions of dorsolateral pre-
frontal cortex and the precuneus became activated for each
task, indicating differential sensitivity of these regions to task-

  

Source: Andrews, Anne M. - Huck Institutes of the Life Sciences, Pennsylvania State University

 

Collections: Biology and Medicine