期刊
BRAIN AND COGNITION
卷 69, 期 3, 页码 559-564出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.bandc.2008.11.008
关键词
Cognitive conflict; Contextual mismatch; Oddball effect; Conflict monitoring; Sensory orienting; Top-down attentional control; Executive functions; Anterior cingulate cortex; Lateral prefrontal cortex; Functional neuroimaging
资金
- German Research Council (DFG) [Gr 1950/1-1, Gr 1950/1-3, Go 720/3-1]
Background monitoring is a necessary prerequisite to detect unexpected changes in the environment, while being involved in a primary task. Here, we used fMRI to investigate the neural mechanisms that underlie adaptive goal-directed behavior in a cued task switching paradigm during real response conflict or, more generally, when expectations on the repetitive features of the environment were violated. Unexpected changes in sensory stimulus attributes in the currently unattended stimulus dimension thereby led to activations in a bilateral network comprising inferior lateral frontal, intraparietal, and posterior medial frontal brain regions, independent of whether these attributes elicited a factual response conflict or not. This fronto-parietal network may thus play an important role in adaptive responding to potentially significant events outside the current focus of attention. (C) 2008 Elsevier Inc. All rights reserved.
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