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Updated: Oct 10, 2025
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Quantitative Static and Dynamic Assessment of Balance Control in Stroke Patients
Published on: May 17, 2020
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Correlation Between Poststroke Balance Function and Brain Symmetry Index in Sitting and Standing Postures
Summary
Electroencephalography (EEG) in a standing position more accurately assesses stroke patients' balance deficits than in a sitting position. This method reveals greater brain asymmetry in standing, correlating with poorer balance function.
Area of Science:
- Neuroscience
- Rehabilitation Medicine
- Biomedical Engineering
Background:
- Stroke frequently causes balance problems, increasing fall risk.
- Assessing balance guides rehabilitation and fall prevention strategies.
- Existing resting-state EEG studies focus on upper limb function, not lower limb balance.
Purpose of the Study:
- Investigate EEG differences between sitting and standing postures in stroke patients.
- Evaluate the feasibility of using EEG for assessing lower limb balance.
- Determine if EEG can quantify balance ability in stroke survivors.
Main Methods:
- Collected resting-state EEG from 11 stroke patients in sitting and standing positions.
- Calculated pairwise-derived brain symmetry index (pdBSI) to measure interhemispheric cortical power asymmetry.
- Assessed balance function using the Berg Balance Scale (BBS).
Main Results:
- Stroke survivors exhibited higher pdBSI (1-25 Hz) in standing versus sitting (p <0.05).
- pdBSI (1-25 Hz) showed a significant negative correlation with BBS scores (r = -0.671, p = 0.034).
- Beta band pdBSI also significantly correlated negatively with BBS (r = -0.711, p = 0.017).
Conclusions:
- Standing posture EEG reveals more severe brain asymmetry in stroke patients.
- EEG-quantified asymmetry, particularly in the 1-25 Hz and beta bands, correlates with balance function.
- EEG in standing posture offers a more specific assessment of balance ability compared to sitting.
