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The Role of Anatomic Connectivity in Inhibitory Control Revealed by Combining Connectome-based Lesion-symptom Mapping
Alex S T Nono1, Marco Anziano1, Michael Mouthon1
1Laboratory for Neurorehabilitation Science, Medicine Section, Faculty of Science and Medicine, University of Fribourg, PER 09, Chemin du Musée 5, 1700, Fribourg, Switzerland.
Brain Topography
|June 10, 2024
Summary
This study reveals that specific brain connections, particularly in the left frontal and temporal regions, are crucial for inhibitory control. Disruptions in these pathways impact performance and brain activity during tasks requiring self-control.
Area of Science:
- Neuroscience
- Cognitive Psychology
- Neurology
Background:
- Inhibitory control, the ability to suppress actions or thoughts, is primarily linked to the anterior cingulate cortex and inferior frontal cortex.
- The precise role of communication pathways between these regions in inhibitory control remains unclear.
- Understanding these connections is vital for comprehending cognitive deficits after brain injury.
Purpose of the Study:
- To investigate how white matter tract integrity influences brain activity and performance during inhibitory control tasks.
- To identify specific neural networks critical for inhibitory control using a lesion-symptom mapping approach.
- To explore the relationship between brain connectivity, electrophysiological markers, and inhibitory control in stroke patients.
Main Methods:
- Utilized a connectome-based lesion-symptom mapping approach in 96 first unilateral stroke patients.
- Recorded behavioral and electrophysiological data (Go/NoGo task) as 'symptoms' of inhibitory control deficits.
- Analyzed the causal influence of white matter tract disruptions on brain function during inhibitory control.
Main Results:
- Identified left frontotemporal and frontobasal intrahemispheric connections as central to inhibitory control performance.
- Found that connections between left temporoparietal and right temporal areas are critical for inhibitory control.
- Demonstrated that specific connections modulate N2 and P3 event-related potentials associated with conflict and inhibition.
Conclusions:
- Inhibitory control relies on a distributed, bilateral brain network, not just localized areas.
- Combining lesion-symptom mapping with functional data offers insights into post-stroke reorganization.
- This approach can refine the interpretation of electrophysiological markers of executive control in stroke patients.
