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Possible functional roles of phase resetting during walking
Taiga Yamasaki1, Taishin Nomura, Shunsuke Sato
1Division of Biophysical Engineering, Department of Systems and Human Science, Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka 560-8531, Japan. taiga@c.oka-pu.ac.jp
Biological Cybernetics
|June 6, 2003
Summary
Phase resetting during walking helps maintain stability by bringing the body back within its balance range and reducing recovery time. This research explores its neural control functions using mathematical models.
Area of Science:
- Biomechanics
- Neuroscience
- Robotics
Background:
- Walking rhythm exhibits phase shifts in response to external perturbations.
- Understanding the neural control of locomotion is crucial for stability and adaptability.
Purpose of the Study:
- To elucidate the functional roles of phase resetting in the neural control of locomotion.
- To analyze how phase reset contributes to maintaining stable walking patterns.
Main Methods:
- Mathematical modeling using a double pendulum and a bipedal locomotion system.
- Analysis of stable limit cycle solutions representing steady-state walking.
- Investigation of phase transition curves (PTC) and phase resetting curves (PRC).
Main Results:
- Phase resetting can help return the system to a stable walking state (limit cycle) from perturbations.
- Phase resetting can decrease the time required to recover stability after a disturbance.
- Optimal phase control strategies and corresponding PTCs were identified for impulsive perturbations.
- Predicted PRC forms for bipedal models were compared with experimental human walking data.
Conclusions:
- Phase resetting plays a vital role in the neural control of locomotion, enhancing stability and recovery.
- Mathematical models provide insights into the functional significance of phase resetting in walking.
- The findings have implications for understanding human and animal locomotion and developing robotic systems.