基于山型肌肉模型的功能电刺激诱导的指尖预测力控制
概括
功能电刺激 (FES) 精确地控制手指的力量以恢复手的功能. 这项研究使用个性化的Hill和多关节模型准确预测FES驱动的指纹输出,帮助康复.
科学领域:
- 生物医学工程
- 康复科学
- 神经科学
背景情况:
- 功能电刺激 (FES) 对于恢复神经障碍手部运动功能至关重要.
- 现有的FES研究往往缺乏同时多关节力预测和个性化建模.
- 精确的手指输出力控制对于有效的FES应用至关重要.
研究的目的:
- 通过Hill模型和多关节指模型准确预测FES的指出力.
- 根据实际的力量输出来验证个性化的Hill模型.
- 为了实现协调的多指控制.
主要方法:
- 针对个体参与者的个性化Hill模型.
- 希尔模型与多关节手指模型的整合.
- 通过在不同的电流条件下比较预测和测量的力来验证模型的准确性.
主要成果:
- 在最佳条件下达到最大目标力的5.1%的正常化平均平方误差.
- 证明了多个手指的协调控制.
- 在预测FES诱导的手指力时验证了个性化模型的准确性.
结论:
- 拟议的方法可以精确控制手动的FES力.
- 个性化的Hill和多关节模型显著提高了FES的准确性.
- 这种方法对先进的手部康复和辅助机器人有前途.
相关概念视频
01:20Motor Unit Stimulation
1.9K
When the neuron of a motor unit fires an action potential, it triggers a series of events, leading to a twitch contraction in the muscle fibers. The process of excitation-contraction coupling is crucial in relaying the action potential to the muscle fibers.
The latent period of contraction marks the onset of excitation-contraction coupling, when the action potential propagates across the sarcolemma, preparing the muscle fibers for contraction. As the fibers enter the contraction phase, the...
The latent period of contraction marks the onset of excitation-contraction coupling, when the action potential propagates across the sarcolemma, preparing the muscle fibers for contraction. As the fibers enter the contraction phase, the...
1.9K
01:22Muscle Stimulation Frequency
2.6K
The contraction strength of muscles is regulated by motor neurons, which modulate the frequency of action potentials dispatched to the motor units based on the body's requirements. This process of varying the muscle stimulation frequency allows muscles to contract with a force that is precisely tailored to the needs of the moment, whether lifting a feather or a heavy box.
Wave summation
At low firing rates, motor neurons induce individual twitch contractions in muscle fibers. These twitches...
Wave summation
At low firing rates, motor neurons induce individual twitch contractions in muscle fibers. These twitches...
2.6K