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Related Experiment Video

Updated: Sep 5, 2025

Determining the Functional Status of the Corticospinal Tract Within One Week of Stroke
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Evaluating stroke rehabilitation using brain functional network and corticomuscular coupling.

Ting Wang1,2, Chenghao Wang1,2, Kai Chen3

  • 1School of Automation, Hangzhou Dianzi University, Hangzhou, China.

The International Journal of Neuroscience
|July 11, 2022
PubMed
Summary

This study introduces a new objective method for assessing stroke rehabilitation using electroencephalogram (EEG) and electromyogram (EMG). Phase transfer entropy (PTE) analysis revealed significant changes in brain connectivity and corticomuscular coupling during recovery.

Keywords:
Brain functional networkEEGEMGcorticomuscular couplingphase transfer entropystroke

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Area of Science:

  • Neuroscience
  • Rehabilitation Medicine
  • Biomedical Engineering

Background:

  • Stroke is a primary cause of long-term disability globally.
  • Current stroke rehabilitation assessments are often subjective, necessitating objective evaluation methods.
  • Understanding brain-motor control changes during recovery is crucial for effective rehabilitation.

Purpose of the Study:

  • To investigate dynamic changes in brain functional connectivity and corticomuscular coupling during stroke rehabilitation.
  • To establish an objective method for assessing stroke recovery using neurophysiological signals.
  • To explore the utility of Phase Transfer Entropy (PTE) in analyzing EEG-EMG relationships in hemiplegic stroke patients.

Main Methods:

  • Synchronous electroencephalogram (EEG) and electromyogram (EMG) data were collected from stroke patients at baseline, 2 weeks, and 4 weeks post-stroke.
  • Brain functional networks were constructed to analyze connectivity patterns.
  • Phase Transfer Entropy (PTE) was employed to quantify corticomuscular coupling.

Main Results:

  • A significant strengthening of overall brain functional network connectivity and increased network characteristic values were observed during rehabilitation.
  • Average corticomuscular PTE initially decreased and subsequently increased, with a notable increase in the frontal lobe.
  • PTE analysis demonstrated a significant relationship between EEG signals and motor recovery in hemiplegic patients.

Conclusions:

  • The study successfully utilized PTE for the novel analysis of EEG signals in hemiplegic stroke patients.
  • Findings suggest that changes in brain functional connectivity and corticomuscular coupling reflect the rehabilitation progress.
  • This neurophysiological approach offers a promising objective tool for evaluating stroke rehabilitation effectiveness.