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A midline dissociation between error-processing and response-conflict monitoring
H Garavan1, T J Ross, J Kaufman
1Department of Psychology and Trinity College Institute of Neuroscience, Trinity College, Dublin 2, Ireland. Hugh.Garavan@tcd.ie
Neuroimage
|October 22, 2003
Summary
This study reveals distinct brain regions for error detection and conflict monitoring. The anterior cingulate cortex specifically processes errors, while the pre-SMA handles response conflict.
Area of Science:
- Neuroscience
- Cognitive Neuroscience
- Brain Imaging
Background:
- Midline brain activation after errors is linked to error detection and conflict monitoring.
- Differentiating these functions is difficult as both increase activation during error trials.
Purpose of the Study:
- To distinguish between error detection and conflict monitoring functions in midline brain regions.
- To investigate the roles of the anterior cingulate cortex and pre-SMA in action monitoring.
Main Methods:
- fMRI was used with a GO/NOGO task featuring frequent commission errors.
- Response conflict was manipulated by varying response speeds.
- A mixed-block and event-related design analyzed tonic and event-related activations.
Main Results:
- Anterior cingulate cortex showed error-specific activation, unaffected by conflict.
- Pre-SMA activation was sensitive to conflict but not specific to errors.
- A caudal cingulate area was involved in both error processing and conflict monitoring.
Conclusions:
- Error processing and conflict monitoring are distinct, dissociable functions.
- These distinct functions are localized to specific midline brain areas.