Understanding the Link Between Functional Profiles and Intelligence Through Dimensionality Reduction and Graph
Francesco Alberti1,2, Arianna Menardi3,4, Daniel S Margulies1,2
1Integrative Neuroscience and Cognition Center (UMR 8002), Centre National del la Recherche Scientifique, Paris, France.
Human Brain Mapping
|February 21, 2025
Summary
Individual brain connectivity differences, particularly in the right ventral-lateral prefrontal cortex (vlPFC), are linked to fluid intelligence. This suggests brain network participation influences cognitive abilities.
Area of Science:
- Neuroscience
- Cognitive Neuroscience
- Brain Imaging
Background:
- Interindividual variability in functional connectivity (FC) profiles correlates with fluid intelligence.
- Previous research utilized high-dimensional approaches to establish this link.
- Functional gradients offer a novel framework for understanding cortical organization.
Purpose of the Study:
- To investigate the association between functional connectivity variability and interindividual differences in intelligence using functional gradients.
- To explore the relationship between specific cortical regions and cognitive traits.
- To provide a low-dimensional perspective on brain functional organization and its cognitive correlates.
Main Methods:
- Utilized a data-driven approach to model the association between FC variability and intelligence.
- Employed functional gradients to map local connectivity profiles in a common low-dimensional space.
- Focused analysis on the right ventral-lateral prefrontal cortex (vlPFC) and its functional relationships.
Main Results:
- Identified an association between fluid intelligence and the functional distance of the right vlPFC from sensory and high-cognition systems.
- Observed that decreased functional affinity with high-cognition systems correlates with more even distribution of vlPFC connections across networks.
- Demonstrated that topological properties of the vlPFC reflect intelligence-related connectivity patterns.
Conclusions:
- The functional organization of the right vlPFC, specifically its distance from sensory and high-cognition systems, is associated with fluid intelligence.
- Widespread functional connectivity from the vlPFC may support the coordination of sensory and high-order cognitive processes.
- Functional gradients provide a valuable framework for linking brain structure, function, and cognitive abilities.
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