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The role of the anterior cingulate cortex in conflict processing: evidence from reverse stroop interference
C C Ruff1, T S Woodward, K R Laurens
1Department of Psychology, University of British Columbia, Vancouver, British Columbia, V6T 1Z4, Canada.
Neuroimage
|November 8, 2001
Summary
The anterior cingulate cortex (ACC) shows extensive activation during cognitive conflict, but this doesn't always correlate with the conflict's measured difficulty. This suggests the ACC may handle various conflict types or resolve prior inhibition.
Area of Science:
- Neuroscience
- Cognitive Psychology
Background:
- The anterior cingulate cortex (ACC) is theorized to detect conflict between competing information streams during cognitive control.
- Understanding the ACC's precise role in conflict processing is crucial for cognitive neuroscience.
Purpose of the Study:
- To investigate the anterior cingulate cortex (ACC) activity using functional magnetic resonance imaging (fMRI) during Stroop tasks.
- To examine how different forms and degrees of conflict between word and color dimensions affect ACC activation.
Main Methods:
- Functional magnetic resonance imaging (fMRI) was employed to measure brain activity.
- Participants performed Stroop tasks with varying degrees of conflict between word meaning and print color.
Main Results:
- A dissociation was observed between the degree of conflict and ACC activation levels.
- Extensive ACC activation occurred when print color interfered with word reading, despite moderate conflict measured by reaction time costs.
Conclusions:
- The ACC may be differentially sensitive to various types of cognitive conflict.
- The ACC's function might extend beyond conflict detection to include the resolution of prior inhibition.