Spatio-Temporal Signatures of Cognitive Function After Pediatric Arterial Ischemic Stroke-A Pilot Study

Area of Science:

• Neuroscience
• Pediatric Neurology
• Cognitive Science

Background:

• Childhood arterial ischemic stroke (AIS) is a severe neurological condition.
• AIS can lead to persistent cognitive impairments, especially in executive functions.
• Brain network disruptions are increasingly recognized as underlying deficits in pediatric stroke.

Purpose of the Study:

• To investigate alterations in functional brain dynamics post-childhood stroke using resting-state fMRI.
• To associate these dynamic brain changes with cognitive outcomes in pediatric patients.
• To explore the relationship between lesion characteristics and brain network alterations.

Main Methods:

• Utilized resting-state functional magnetic resonance imaging (fMRI) in 16 pediatric stroke patients and 17 controls.
• Employed co-activation pattern (CAP) analysis to identify recurring brain states and their temporal dynamics.
• Correlated brain state properties with lesion extent and cognitive performance.

Main Results:

• Pediatric stroke patients exhibited increased prevalence and transition frequency of a frontoparietal network brain state.
• A decreased occurrence of a default mode network deactivation state was observed in patients.
• Altered brain dynamics were associated with the impact of lesion location on functional networks, rather than solely lesion size.

Conclusions:

• Disrupted brain dynamics following childhood stroke are linked to cognitive performance.
• Focal lesion location significantly influences widespread brain state dynamics.
• Understanding these dynamic changes is crucial for predicting and managing cognitive deficits after pediatric stroke.