Identification of the Neural Correlates Underlying Conflict Resolution Performance Using a Rodent Analogue of the...

Area of Science:

• Neuroscience
• Cognitive Psychology
• Neurobiology

Background:

• The Stroop test is a key neuropsychological tool for assessing attention and conflict resolution.
• This test is sensitive to neurological diseases like Alzheimer's, Parkinson's, and Huntington's.
• The neural underpinnings of Stroop performance, particularly basal ganglia involvement, remain largely uncharacterized.

Purpose of the Study:

• To investigate the role of striatal subregions in conflict resolution using a rodent model.
• To identify specific brain regions recruited during the processing of cognitive conflict.

Main Methods:

• Utilized the Response-Conflict task (rRCT), a rodent analogue of the Stroop test.
• Administered congruent and incongruent stimuli during the rRCT.
• Analyzed immediate early gene (Zif268) expression in cortical, hippocampal, and basal ganglia subregions.

Main Results:

• Confirmed known involvement of prefrontal cortex and hippocampus.
• Identified a role for the dysgranular retrosplenial cortex in conflict resolution.
• Found a significant correlation between performance accuracy and reduced neural activation in the dorsomedial striatum.
• Reported novel involvement of the basal ganglia in this cognitive process.

Conclusions:

• Conflict resolution involves prefrontal cortical regions, dysgranular retrosplenial cortex, and the medial neostriatum.
• These findings highlight the basal ganglia's role in cognitive conflict.
• Implications for understanding impaired Stroop performance in neurological disorders.