Journal
EXPERIMENTAL PSYCHOLOGY
Volume 51, Issue 4, Pages 270-278Publisher
HOGREFE & HUBER PUBLISHERS
DOI: 10.1027/1618-3169.51.4.270
Keywords
attention; working memory; executive processes; frontopolar cortex; fMRI
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In a series of event-related functional magnetic resonance studies, we consistently found activation in anterior prefrontal cortex related to visual dimension changes in singleton search tasks. I review these data and discuss possible contributions of anterior prefrontal cortex to attention control in visual search. It is proposed that anterior prefrontal cortex may detect task-relevant stimulus changes when the target is ambiguously defined. This process may occur in the absence of awareness and may support visual dimension weighting by inhibition of the old relevant dimension in favor of the new dimension.
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