Related Experiment Videos
Quantification of antagonist muscle coactivation in children with spastic diplegia
M M Cowan1, D S Stilling, S Naumann
1Division of Biomedical Engineering, College of Engineering, University of Saskatchewan, Saskatoon, Canada.
Insights
This study used the Pearson Product-Moment correlation coefficient to analyze muscle coactivation in children with spastic diplegia. Results show significant coactivation on the right side and independent muscle activity on the left, offering insights for physical therapy.
Area of Science:
- Biomedical Engineering
- Neuroscience
- Rehabilitation Science
Background:
- Spastic diplegia often involves altered muscle activation patterns.
- Quantifying muscle coactivation is crucial for understanding motor control deficits.
Purpose of the Study:
- To evaluate the Pearson Product-Moment correlation coefficient (PPM) for quantifying muscle coactivation.
- To assess side differences in muscle activity in children with spastic diplegia.
Main Methods:
- Electromyography (EMG) recorded soleus and tibialis anterior muscle activity.
- Signals were processed using a Hamming filter and subjected to the PPM test.
- Two children with spastic diplegia participated in voluntary ankle movements against resistance.
Main Results:
- Significant muscle coactivation was observed on the right side of both subjects (high positive coefficients).
- Independent muscle activity was noted on the left side (high negative coefficients).
- The PPM method effectively differentiated between sides.
Conclusions:
- The Pearson Product-Moment correlation coefficient is a promising tool for quantifying muscle coactivation in spastic diplegia.
- This method can describe side differences and assess therapeutic interventions.
- Further research can validate its use in clinical settings.
Abstract:
The purpose of this study was to investigate the use of the Pearson Product-Moment correlation coefficient to quantify muscle coactivation using electromyography. The subjects were two children with spastic diplegia. Surface electrodes were used to record muscle activity from the soleus and tibialis anterior muscles during voluntary attempts at dorsiflexion and plantarflexion of the ankle against resistance. The linear envelope signals were smoothed with a Hamming filter at a cutoff frequency of 4 Hz and intervals of the resultant pairs of curves subjected to the PPM test. Both subjects demonstrated significant coactivation on their right side and independent activity on the left, indicated by high positive and negative coefficients, respectively. This method shows promise for description of side differences in diplegics and for assessing the effects of physical therapy and other interventions.