NBS-SNI, an extension of the network-based statistic: Abnormal functional connections between important structural
Francis Normand1,2,3, Mehul Gajwani3, Daniel C Côté1,4
1Centre de Recherche CERVO, Québec, Canada.
Network Neuroscience (Cambridge, Mass.)
|April 2, 2024
Summary
A new method, network-based statistic-simultaneous node investigation (NBS-SNI), integrates brain structure and function to identify connectivity abnormalities in brain disorders like autism and psychosis, improving prediction power.
Area of Science:
- Network neuroscience
- Brain connectivity
- Computational psychiatry
Background:
- Brain structure and function coupling is crucial for understanding brain development and disorders.
- Abnormal brain connectivity is linked to the onset of neurological and psychiatric conditions.
- Existing methods may not fully capture the interplay between structural and functional brain networks.
Purpose of the Study:
- Introduce a novel method, network-based statistic-simultaneous node investigation (NBS-SNI), to identify brain connectivity abnormalities.
- Integrate structural and functional brain representations into a unified framework.
- Enhance the detection of case-control differences in brain network studies.
Main Methods:
- Developed NBS-SNI, building upon the established network-based statistic (NBS).
- NBS-SNI considers both node properties (e.g., closeness centrality, local information dimension) and their connections.
- Validated using synthetic data to determine optimal statistical resolution and applied to real case-control studies (autism, early psychosis).
Main Results:
- NBS-SNI successfully identified hypo- and hyperconnected subnetworks in autism and early psychosis cohorts.
- The method demonstrated a 9 percentage point increase in prediction power compared to the standard NBS.
- Identified specific regimes where NBS-SNI offers enhanced statistical resolution.
Conclusions:
- NBS-SNI provides a powerful, integrated framework for analyzing brain connectivity abnormalities.
- The method improves the detection of subtle network alterations in brain disorders.
- NBS-SNI offers significant advancements in network neuroscience for clinical applications.
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