Atypical functional connectivity hierarchy in Rolandic epilepsy

Area of Science:

• Neuroscience
• Developmental Neuroscience
• Systems Neuroscience

Background:

• Functional connectivity hierarchy is crucial for brain organization and development.
• Atypical brain network hierarchy in Rolandic epilepsy remains under-investigated.
• Understanding these changes is key to comprehending epilepsy's impact on the developing brain.

Purpose of the Study:

• To investigate age-related functional connectivity alterations in Rolandic epilepsy.
• To explore the relationship between connectivity changes, seizure incidence, cognition, and genetics.
• To establish a framework for studying brain hierarchy in neurological disorders.

Main Methods:

• Utilized functional magnetic resonance imaging (fMRI) to measure multi-axis functional connectivity gradients.
• Analyzed data from 162 children with Rolandic epilepsy and 117 typically developing children.
• Examined connectivity alterations across different age groups.

Main Results:

• Rolandic epilepsy exhibits a contracting and slowing expansion of functional connectivity gradients with age.
• These gradient alterations reflect atypical age-related changes in the brain's segregation properties.
• Observed correlations between gradient alterations, seizure frequency, cognitive function, and genetic factors.

Conclusions:

• Atypical functional connectivity hierarchy is a system-level substrate of Rolandic epilepsy.
• Rolandic epilepsy may represent a disorder of information processing across multiple functional domains.
• The study provides a framework for large-scale brain hierarchical research in epilepsy.