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Dorsal anterior cingulate cortex: a role in reward-based decision making
George Bush1, Brent A Vogt, Jennifer Holmes
1Department of Psychiatry, Harvard Medical School, Boston, MA 02115, USA. geo@nmr.mgh.harvard.edu
Summary
The dorsal anterior cingulate cortex (dACC) plays a role in reward-based decision-making. This study provides evidence for functional heterogeneity within the dACC, linking human and monkey research.
Area of Science:
- Neuroscience
- Cognitive Neuroscience
- Neuroimaging
Background:
- The dorsal anterior cingulate cortex (dACC) is implicated in cognition and motor control.
- Understanding dACC mechanisms is challenging due to difficulties linking human neuroimaging and monkey electrophysiology data.
- A hypothesis suggests dACC comprises functionally distinct cell populations.
Purpose of the Study:
- To test the hypothesis of functional heterogeneity within the human dACC.
- To investigate the role of dACC in reward-based decision-making.
- To bridge the gap between human and monkey dACC research.
Main Methods:
- Event-related functional magnetic resonance imaging (fMRI) was employed.
- A reward-based decision-making task was designed to isolate specific dACC responses.
- Analyses focused on dACC activation during reduced reward (REDrew) trials compared to fixation (FIX).
Main Results:
- Significant dACC activation was observed in seven out of eight subjects during REDrew trials (P < 10(-4)).
- Group analyses confirmed predicted ordinal relationships in fMRI activation across trial types (REDrew > SWITCH > CONrew ≥ FIX).
- Findings support a subpopulation of dACC cells sensitive to reward reduction.
Conclusions:
- The dorsal anterior cingulate cortex is involved in reward-based decision-making.
- The study provides initial evidence for functional heterogeneity within the human dACC.
- These findings help integrate human and non-human primate dACC research.