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Updated: Feb 12, 2026
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Assessment of Neuromuscular Function Using Percutaneous Electrical Nerve Stimulation
Published on: September 13, 2015
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Intensity- and Duration-Adaptive Functional Electrical Stimulation Using Fuzzy Logic Control and a Linear Model for
Guangtao Chen1, Zhihang Shen1, Yu Zhuang1
1Key Laboratory of Sensing Technology and Biomedical Instrument of Guangdong Province, School of Engineering, Sun Yat-Sen University, Guangzhou, China.
Frontiers in Neurology
|April 5, 2018
Summary
Functional electrical stimulation (FES) for dropfoot improves gait rehabilitation. An intensity- and duration-adaptive stimulation (IDAS) system enhanced ankle movement in poststroke patients, showing better performance than other methods.
Area of Science:
- Rehabilitation Engineering
- Biomechanics
- Neuroscience
Background:
- Dropfoot significantly impacts gait rehabilitation in poststroke patients.
- Time-varying walking velocities pose challenges for conventional Functional Electrical Stimulation (FES).
- Existing FES methods struggle to optimize movement performance during dynamic walking conditions.
Purpose of the Study:
- To evaluate an intensity- and duration-adaptive stimulation (IDAS) controller for FES-assisted walking in poststroke dropfoot.
- To compare the kinematic performance of IDAS with no stimulation (NS), heel-off stimulation (HOS), and speed-adaptive stimulation.
- To determine if adaptive stimulation improves ankle joint kinematics during gait.
Main Methods:
- Recruited seven poststroke subjects with dropfoot.
- Applied fuzzy logic control and a linear model for IDAS during FES-assisted walking.
- Evaluated kinematic data, focusing on ankle dorsiflexion and plantar flexion angles.
- Compared IDAS performance against NS, HOS, and speed-adaptive stimulation conditions.
Main Results:
- IDAS achieved a significantly larger maximum ankle dorsiflexion angle compared to other conditions.
- Ankle plantar flexion angles under IDAS were comparable to normal walking.
- Improved ankle joint angles suggest appropriate stimulation intensity and duration were delivered by IDAS.
Conclusions:
- The intensity- and duration-adaptive controller (IDAS) enhances movement performance in FES-assisted walking for dropfoot.
- IDAS demonstrates potential for improved clinical applications in gait rehabilitation.
- Adaptive FES control is crucial for optimizing gait kinematics in neurologically impaired individuals.
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