Dissociable networks control conflict during perception and response selection: a transcranial magnetic stimulation
Alexander Soutschek1, Paul C J Taylor, Hermann J Müller
1Ludwig-Maximilians-Universität München, Munich, Germany. Alexander.Soutschek@psy.lmu.de
Cognitive control uses distinct brain networks to resolve perceptual and response selection conflicts. The presupplementary motor area handles response conflict, while the posterior intraparietal sulcus manages perceptual conflict.
Area of Science:
- Neuroscience
- Cognitive Psychology
Background:
- Current models suggest cognitive control enhances perceptual processing to resolve flanker task conflict.
- Flanker tasks involve conflict at both perceptual and response selection levels.
Purpose of the Study:
- To test for conflict-specific control networks for perceptual and response selection conflicts.
- To investigate the roles of the presupplementary motor area (SMA) and posterior intraparietal sulcus/inferior parietal lobule (pIPS/IPL) in conflict resolution.
Main Methods:
- Utilized transcranial magnetic stimulation (TMS) to probe brain regions.
- Applied TMS to the SMA and pIPS/IPL during a flanker task.
Main Results:
- TMS of the SMA selectively disrupted response selection conflict processing.
- TMS of the pIPS/IPL interfered with perceptual conflict processing.
- SMA resolved response conflict when prior trials were conflict-free; pIPS/IPL resolved perceptual conflict when prior trials had conflict.
Conclusions:
- Evidence supports distinct, conflict-specific neural networks for cognitive control.
- Models of cognitive control require revision to incorporate level-specific conflict resolution mechanisms.
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