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相关概念视频

Motor Unit Stimulation01:20

Motor Unit Stimulation

1.6K
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...
1.6K
Hierarchy of Motor Control01:18

Hierarchy of Motor Control

2.9K
The hierarchy of motor control refers to the different levels of organization and processing involved in controlling movement in the body. These levels range from higher cortical areas involved in planning and decision-making to lower spinal cord reflexes that respond automatically to external stimuli.
2.9K
Excitation-Contraction Coupling in Skeletal Muscles01:20

Excitation-Contraction Coupling in Skeletal Muscles

8.5K
Excitation-contraction coupling is a series of events that occur between generating an action potential and initiating a muscle contraction. It occurs at the triad, a structure found in skeletal muscle fibers that comprise a T-tubule and terminal cisternae of the sarcoplasmic reticulum on each side. These triads are visible in longitudinally sectioned muscle fibers. They are typically located at the A-I junction — the junction between the A and I bands of the sarcomere.
When an action...
8.5K
Motor Units01:13

Motor Units

4.1K
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...
4.1K

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相关实验视频

Updated: Jul 19, 2025

A Structured Rehabilitation Protocol for Improved Multifunctional Prosthetic Control: A Case Study
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A Structured Rehabilitation Protocol for Improved Multifunctional Prosthetic Control: A Case Study

Published on: November 6, 2015

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一致的控制信息驱动的肌肉骨模型用于多天的肌电控制.

Jiamin Zhao1, Yang Yu1, Xinjun Sheng1,2

  • 1State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai, People's Republic of China.

Journal of neural engineering
|August 11, 2023
PubMed
概括

这项研究引入了改进的非负矩阵因子化 (NMF) 算法,以增强电肌图 (EMG) 驱动的肌肉骨模型 (MMs),以实现强大的人机交互,而不需要重新培训.

关键词:
多日零再培训多日零再培训肌肉骨模型的模型肌电界面的介面 肌电界面非负矩阵因数分解算法算法

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Subject-specific Musculoskeletal Model for Studying Bone Strain During Dynamic Motion
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Subject-specific Musculoskeletal Model for Studying Bone Strain During Dynamic Motion

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Multifunctional Setup for Studying Human Motor Control Using Transcranial Magnetic Stimulation, Electromyography, Motion Capture, and Virtual Reality
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Multifunctional Setup for Studying Human Motor Control Using Transcranial Magnetic Stimulation, Electromyography, Motion Capture, and Virtual Reality

Published on: September 3, 2015

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相关实验视频

Last Updated: Jul 19, 2025

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06:58

A Structured Rehabilitation Protocol for Improved Multifunctional Prosthetic Control: A Case Study

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Subject-specific Musculoskeletal Model for Studying Bone Strain During Dynamic Motion

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科学领域:

  • 生物医学工程 生物医学工程
  • 人与机器的互动 人与机器的互动
  • 康复机器人 康复机器人

背景情况:

  • 电肌图 (EMG) 驱动的肌肉骨模型 (MMs) 对人机交互至关重要.
  • 非静态的EMG信号特征降低了EMG驱动MM的长期性能.
  • 为了可靠的长期控制,需要持续的肌肉刺激提取.

研究的目的:

  • 为EMG驱动的MMs开发一种强大的零训练肌肉刺激提取方法.
  • 为了提高MMs的估计性能,同时预测手和手腕运动.
  • 在长期的肌电控制中解决EMG信号的非静止性.

主要方法:

  • 通过添加约束和L2-规范规范化术语,开发了一种改进的非负矩阵因子化 (NMF) 算法.
  • 增强的NMF被应用于提取稳定的肌肉协同作用及其随时间变化的配置文件.
  • 提取的肌肉协同作用被用来驱动运动预测的肌肉骨模型.

主要成果:

  • 与现有方法相比,拟议的方法在日间实验中显示出明显优越和强大的性能.
  • 竞争方法包括机器学习,EMG信封驱动的MM和基于NMF的经典MM.
  • 分析证实了该方法在不同日间实现一致的肌肉刺激方面的有效性.

结论:

  • 开发的基于NMF的方法为强大的,零再训练控制肌电接口提供了有希望的途径.
  • 这种方法提高了长期应用的EMG驱动MM的可靠性和一致性.
  • 这些发现为更直观,更可靠的人机交互系统铺平了道路.