Network analysis of structural MRI predicts executive function in paediatric traumatic brain injury

Area of Science:

• Neuroscience
• Developmental Neuroscience
• Neuroimaging

Background:

• Paediatric traumatic brain injury (pTBI) frequently leads to cognitive impairments, particularly executive dysfunction (EF).
• Previous research often analyzed brain morphometric features independently, overlooking their interconnected network.
• Morphometric similarity offers a novel method to assess cortical organization and its relationship to brain injury.

Purpose of the Study:

• To investigate the neuroanatomical correlates of executive dysfunction following paediatric TBI.
• To explore the utility of morphometric similarity as a measure of cortical organization in pTBI.
• To assess the predictive validity of morphometric similarity for long-term executive functioning.

Main Methods:

• Retrospective analysis of structural MRI data from 83 pTBI patients and 33 controls.
• Estimation of morphometric similarity by correlating regional cortical features.
• Partial least squares regression used to predict executive functioning two years post-injury.

Main Results:

• No significant difference in overall morphometric similarity magnitude between patients and controls.
• Specific patterns of ROI-level morphometric similarity predicted parent-reported EF difficulties.
• Predictions were validated using cross-validation and were driven by prefrontal cortex regions.
• Cortical organization measures outperformed individual morphometric features in prediction accuracy.

Conclusions:

• Morphometric similarity analysis is a valuable tool for predicting executive functioning in children with pTBI.
• This methodology enhances understanding of the neuroanatomical basis of EF deficits after brain injury.
• The findings highlight the importance of network-level cortical organization in recovery and function.