The dorsal medial frontal cortex is sensitive to time on task , not response con fl ict or 2 error likelihood
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چکیده
10 Article history: 11 Received 30 September 2010 12 Revised 23 November 2010 13 Accepted 6 December 2010 14 Available online xxxx 1567 18 19 The dorsal medial frontal cortex (dMFC) is highly active during choice behavior. Though many models have 20 been proposed to explain dMFC function, the conflict monitoring model is the most influential. It posits that 21 dMFC is primarily involved in detecting interference between competing responses thus signaling the need 22 for control. It accurately predicts increased neural activity and response time (RT) for incompatible (high23 interference) vs. compatible (low-interference) decisions. However, it has been shown that neural activity 24 can increase with time on task, even when no decisions are made. Thus, the greater dMFC activity on 25 incompatible trials may stem from longer RTs rather than response conflict. This study shows that (1) the 26 conflict monitoring model fails to predict the relationship between error likelihood and RT, and (2) the dMFC 27 activity is not sensitive to congruency, error likelihood, or response conflict, but is monotonically related to 28 time on task. 29 © 2010 Published by Elsevier Inc.
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The dorsal medial frontal cortex is sensitive to time on task, not response conflict or error likelihood
The dorsal medial frontal cortex (dMFC) is highly active during choice behavior. Though many models have been proposed to explain dMFC function, the conflict monitoring model is the most influential. It posits that dMFC is primarily involved in detecting interference between competing responses thus signaling the need for control. It accurately predicts increased neural activity and response ti...
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