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Functional Connectivity Linked to Cognitive Recovery After Minor Stroke.

Vrishab Commuri¹, Isabella Dallasta², Ciaran Stone³

¹Department of Electrical and Computer Engineering, The University of Maryland, College Park, Maryland, USA.

Annals of Clinical and Translational Neurology

|December 6, 2025

Summary

This summary is machine-generated.

Brain connectivity patterns after minor stroke correlate with cognitive recovery. Specific functional connectivity profiles in the frontoparietal cortex (FPC) are linked to improved cognitive performance over time, suggesting potential for outcome prediction.

Keywords:

cognition functional connectivity magnetoencephalography recovery stroke

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Area of Science:

Neuroscience
Cognitive Neurology
Biomedical Engineering

Background:

Minor stroke leads to cognitive deficits, particularly slowed processing speed.
Functional connectivity alterations in the frontoparietal cortex (FPC) are observed post-stroke.
The evolution of these connectivity patterns over time is not fully understood.

Purpose of the Study:

To investigate the relationship between functional connectivity patterns and cognitive performance in minor stroke patients.
To identify the neurophysiological underpinnings of cognitive improvement after minor stroke.
To explore the potential of connectivity profiles for evaluating and predicting long-term cognitive outcomes.

Main Methods:

Resting-state magnetoencephalography (MEG) was used to assess functional connectivity.
Network Localized Granger Causality framework was applied to estimate connectivity.
Neuropsychological tests evaluated cognitive performance across multiple domains.
Longitudinal data collection occurred at 1-month and 3-6-month follow-ups.

Main Results:

Significant increases in contralesional frontoparietal beta-band connectivity correlated with improved behavioral performance.
Early reliance on the contralesional hemisphere was associated with better acute cognitive scores.
Continued reliance on the ipsilesional hemisphere correlated with poorer later cognitive performance.

Conclusions:

Specific functional connectivity profiles are associated with better acute and long-term cognitive performance after minor stroke.
These profiles may indicate a greater potential for cognitive recovery.
Further research is needed to determine if these connectivity patterns are modifiable.