Individual-specific functional connectivity of the amygdala: A substrate for precision psychiatry

Area of Science:

• Neuroscience
• Brain Network Organization
• Functional Connectivity

Background:

• The amygdala's role in psychiatric disorders is established, but its network integration is unclear.
• Precise understanding of amygdala network position is crucial for patient-specific dysfunction models and treatments.

Purpose of the Study:

• To investigate the amygdala's network organization and functional subdivisions within the human brain.
• To establish a framework for amygdala-cortical interactions relevant to psychiatric conditions.

Main Methods:

• High-fidelity fMRI data (5 hours/person) from 10 individuals to map amygdala subdivisions.
• Functional connectivity analysis correlating amygdala subdivisions with large-scale brain networks.
• Replication in an independent dataset of 120 individuals.

Main Results:

• Identified three distinct amygdala subdivisions with preferential network correlations (default mode, dorsal attention/fronto-parietal, and a non-preferential subdivision).
• All subdivisions showed specific positive and negative correlations with other networks (ventral attention, somatomotor, salience, cingulo-opercular).
• Found significant individual variation in connectivity, linked to anatomical locations; confirmed temporal ordering of signals.

Conclusions:

• Detailed framework of amygdala-cortical interactions established.
• Individual differences in amygdala connectivity patterns identified.
• Provides a foundation for linking amygdala network aberrations to psychiatric symptoms for personalized medicine.