EEG Based Cortico-Muscular Connectivity During Standing Early Post Stroke

Area of Science:

• Neuroscience
• Rehabilitation Medicine
• Motor Control

Background:

• Stroke survivors often experience impaired motor function and balance deficits.
• Understanding the neural control of posture and locomotion is crucial for effective stroke rehabilitation.

Purpose of the Study:

• To investigate brain activation and corticomuscular connectivity during standing in individuals with subacute stroke.
• To explore the relationship between corticomuscular connectivity and balance performance in the stroke group.

Main Methods:

• Electroencephalography (EEG) and electromyography (EMG) were used to record brain and muscle activity during standing.
• Analysis focused on EEG power, corticomuscular connectivity, and correlations with balance assessments.

Main Results:

• A trend towards higher EEG power (hyperactivation) was observed in the stroke group.
• Lower corticomuscular connectivity was found between sensorimotor cortices and contralateral lower extremity muscles in individuals with stroke.
• Higher corticomuscular connectivity was correlated with better balance assessment scores in the stroke group.

Conclusions:

• Preliminary findings suggest sensorimotor cortex re-organization in controlling lower extremity muscles post-stroke.
• Altered brain-muscle communication and its relationship to balance highlight potential targets for rehabilitation strategies.
• This study provides insights into the neural underpinnings of standing deficits after cerebrovascular accident (CVA).