Journal
SCIENCE
Volume 301, Issue 5631, Pages 384-386Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1086025
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- Wellcome Trust [077029] Funding Source: Medline
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The principles underlying human hemispheric specialization are poorly understood. We used functional magnetic resonance imaging of letter and visuospatial decision tasks with identical word stimuli to address two unresolved problems. First, hemispheric specialization depended on the nature of the task rather than on the nature of the stimulus. Second, analysis of frontal candidate regions for cognitive control showed increased coupling between left anterior cingulate cortex (ACC) and left inferior frontal gyrus during letter decisions, whereas right ACC showed enhanced coupling with right parietal areas during visuospatial decisions. Cognitive control is thus localized in the same hemisphere as task execution.
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