Functional Brain Network of Trait Impulsivity: Whole-Brain Functional Connectivity Predicts Self-Reported Impulsivity

Area of Science:

• Neuroscience
• Cognitive Neuroscience
• Brain Imaging

Background:

• Impulsivity is a complex trait with broad behavioral implications.
• A comprehensive understanding of the functional brain circuits underlying impulsivity is needed.

Purpose of the Study:

• To identify brain networks predictive of individual impulsivity levels.
• To map functional connectivity associated with trait impulsivity in healthy males.

Main Methods:

• Utilized whole-brain resting-state functional connectivity data from 156 healthy males.
• Employed K-fold cross-validation for feature selection and stratified 10-fold cross-validation for model training and testing.
• Selected participants across the full spectrum of impulsivity scores using the Barratt Impulsiveness Scale (BIS)-11.

Main Results:

• Identified a widespread neural network associated with trait impulsivity.
• Demonstrated a significant correlation between predicted and observed impulsivity scores.
• Highlighted the importance of the cerebellum, brainstem, temporal lobe, basal ganglia, thalamus, prefrontal cortex, and motor strip in impulsivity.

Conclusions:

• The study reveals a comprehensive functional brain network underlying trait impulsivity.
• Findings support and expand upon previous research on impulsivity-related brain networks.
• This work provides a foundation for understanding dysfunctional impulsivity.