Human brain state dynamics reflect individual neuro-phenotypes.

Area of Science:

• Neuroscience
• Cognitive Science
• Psychology

Background:

• Individual differences in neural activity and behavior are recognized as states (within-individual) and traits (between-individual).
• The relationship between these state-trait neural variations and behavioral phenotypes remains incompletely understood.
• Resting-state functional magnetic resonance imaging (rs-fMRI) offers a window into intrinsic brain function.

Purpose of the Study:

• To quantify moment-to-moment changes in brain-wide co-activation patterns using rs-fMRI.
• To identify reproducible spatio-temporal features of these patterns at the individual level.
• To investigate the link between state-trait neural variations and behavioral differences.

Main Methods:

• Analysis of resting-state functional magnetic resonance imaging (rs-fMRI) data.
• Quantification of brain-wide co-activation patterns and their dynamic changes.
• Feature reduction techniques applied to identify key neural variations.
• Correlation analysis between neural variations and behavioral phenotypes.

Main Results:

• Reproducible spatio-temporal features of co-activation patterns were identified at the single-subject level.
• A joint analysis revealed general motifs of individual differences, including state-specific and general neural features with daily variability.
• Principal neural variations significantly co-varied with behavioral phenotypes related to cognitive function, emotion regulation, and substance use.
• Individual-specific probabilities of occupying particular co-activation patterns were reproducible and associated with neural and behavioral features.

Conclusions:

• The study successfully quantified dynamic, state-trait neural variations from rs-fMRI.
• These neural variations are linked to individual differences in behavior, including cognition and emotion regulation.
• The approach holds promise for developing reproducible neuroimaging markers for predicting individual functional outcomes.