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Soft Pneumatic Robot Modulates Graph Theory Metrics of Brain Network for Hand Rehabilitation After Stroke
Published on: October 10, 2025
413
Evoked slow oscillations and dynamic network reorganization after stroke
Caroline Tscherpel1,2,3, Maike Mustin1, Nils Rosjat3
1Goethe University Frankfurt, Department of Neurology, University Hospital Frankfurt, Goethe University, 60596 Frankfurt am Main, Germany.
Brain Communications
|November 3, 2025
Summary
Stroke disrupts brain network connectivity, increasing slow delta-band activity and decreasing network complexity. This early disruption predicts long-term motor deficits, but recovery involves normalizing connectivity and restoring network organization.
Area of Science:
- Neuroscience
- Neurology
- Systems Neuroscience
Background:
- Focal ischemic lesions from stroke can disrupt neuronal activity beyond structural damage.
- Understanding post-stroke network reorganization is crucial for predicting functional recovery.
Purpose of the Study:
- To investigate longitudinal changes in cortical connectivity and network architecture after stroke.
- To correlate early network alterations with motor outcomes over time.
Main Methods:
- Combined transcranial magnetic stimulation (TMS) and electroencephalography (EEG).
- Employed dynamic connectivity analyses and graph theory.
- Studied 41 patients longitudinally post-stroke.
Main Results:
- Increased delta-band coupling and slow activity observed in early post-stroke phases.
- Reduced small-worldness and modularity indicated impaired information integration and segregation.
- Early network disruption, particularly small-worldness, predicted motor deficits.
- Motor recovery correlated with normalized delta coupling and restored network topology (>3 months post-stroke).
Conclusions:
- Stroke significantly alters cortical network architecture, characterized by increased slow-frequency coupling and decreased network complexity.
- Early network alterations are linked to motor deficits, highlighting their prognostic value.
- Functional recovery is associated with the normalization of connectivity and the reinstatement of a complex, modular network structure.
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