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Alterations in muscle activation patterns during robotic-assisted walking.
1Department of Biomedical Engineering, Catholic University, 620 Michigan Avenue, NE Washington, DC 20064, USA. hidler@cua.edu
Clinical Biomechanics (Bristol, Avon)
|December 29, 2004
Summary
Robotic-assisted walking alters leg muscle activation patterns compared to normal walking. This research quantifies these changes, aiding neurorehabilitation and robotic device development.
Area of Science:
- Biomechanics
- Neurorehabilitation Engineering
- Human Movement Science
Background:
- Robotic devices are increasingly used in neurorehabilitation, showing promise.
- The impact of robotic assistance on natural walking muscle activation patterns remains unquantified.
Purpose of the Study:
- To compare muscle activation patterns during robotic-assisted walking versus treadmill walking.
- To quantify alterations in leg muscle activity during gait with robotic assistance.
Main Methods:
- Electromyography (EMG) data collected during treadmill and robotic-assisted walking.
- Gait cycles were analyzed in seven distinct phases.
- Muscle activation was averaged, normalized, and compared using ANOVA.
Main Results:
- Significant spatial and temporal differences in muscle activation were found.
- Quadriceps and hamstring activity increased during the swing phase with robotic assistance.
- Ankle muscle activity was reduced throughout most of the gait cycle during robotic-assisted walking.
Conclusions:
- Robotic orthoses alter natural muscle activation patterns due to restricted movement.
- Understanding these alterations is crucial for clinical comparisons in neurological disorders and for refining robotic gait training devices.