通过将动力单元放电与肌肉骨模型相结合来估计手腕扭矩
概括
这项研究引入了一种新的肌肉骨模型,使用电肌图 (EMG) 分解来实现更好的肌电控制. 该模型准确地估计了手腕运动,促进了康复和机器人应用.
科学领域:
- 生物医学工程 生物医学工程
- 神经科学是一个神经科学.
- 机器人技术 机器人技术 机器人技术
背景情况:
- 肌电控制通常依赖于机器学习,限制了生物洞察力,需要大量的训练数据.
- 电肌图 (EMG) 分解技术为理解运动生成提供了一个潜在的替代方案.
- 神经肌肉骨模型为解释控制系统中的生物机制提供了一个框架.
研究的目的:
- 开发一种基于分解的肌肉骨模型,用于同时和比例的肌电控制.
- 克服目前基于机器学习的控制方案的局限性.
- 为复杂的运动提供一种生物学上可解释的模型.
主要方法:
- 16名受试者在两度自由度 (DoF) 中进行了对称手腕收缩.
- 收集了高密度表面EMG和扭矩数据.
- 电磁场信号被分解成运动单元动作潜能列车 (MUAPt),使用四种方法进行聚类,并用于提取肌肉骨模型的神经特征.
主要成果:
- 基于激活的集群方法利用抽特征证明了高精度 (R2 = 0.791 ± 0.101和0.622 ± 0.148).
- 这种方法也实现了优异的光滑度 (粗度=1.389 ± 0.211和1.140 ± 0.159).
结论:
- 拟议的基于动力单元动力电位列车 (MUAPt) 的肌肉骨模型准确地估计了连续的2DoF手腕扭矩.
- 这种方法为多DoF运动的神经机械特性提供了新的见解.
- 它推动了敏捷康复和机器人控制系统的发展.
相关概念视频
Motor Unit Stimulation
1.4K
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...
1.4K
Motor Units
3.7K
The motor unit is a fundamental component of the neuromuscular system and plays a crucial role in coordinating muscle contractions. It consists of a somatic motor neuron, which connects and controls multiple skeletal muscle fibers, forming a single functional segment. The axon of the motor neuron branches out and establishes synaptic connections known as neuromuscular junctions with individual muscle fibers within the motor unit.
Motor units come in different sizes, with smaller units...
Motor units come in different sizes, with smaller units...
3.7K
Electro-mechanical Systems
907
Electromechanical systems are intricate configurations that effectively combine electrical and mechanical elements to achieve a desired outcome. Central to many of these systems is the DC motor, a device that converts electrical energy into mechanical motion, enabling various applications ranging from simple fans to complex robotic mechanisms.
A key component of the DC motor is the armature, a rotating circuit positioned within a magnetic field. As an electric current passes through the...
A key component of the DC motor is the armature, a rotating circuit positioned within a magnetic field. As an electric current passes through the...
907
Angle of Twist: Problem Solving
255
An electric motor applies a torque of 700 N·m to an aluminum shaft, triggering a stable rotation. Two pulleys, B and C, are subjected to torques of 300 N·m and 400 N·m, respectively. The modulus of rigidity is provided as 25 GPa. With the knowledge of the length and diameter of each segment, the twist angle between the two pulleys can be computed. First, a section cut is made between pulleys B and C, and the cut cross-section is analyzed using a free-body diagram. Given that the...
255
Muscle Stimulation Frequency
2.0K
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...
2.0K
Net Torque Calculations
9.0K
When a mechanic tries to remove a hex nut with a wrench, it is easier if the force is applied at the farthest end of the wrench handle. The lever arm is the distance from the pivot point (the hex nut in this case) to the person’s hand. If this distance is large, the torque is higher. Only the component of the force perpendicular to the lever arm contributes to the torque. Therefore, pushing the wrench perpendicular to the lever arm is more advantageous. If multiple people apply force to...
9.0K


