Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Motor Unit Stimulation01:20

Motor Unit Stimulation

1.3K
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...
1.3K
Generation of Action Potential in Skeletal Muscles01:24

Generation of Action Potential in Skeletal Muscles

4.0K
Every cell in the body maintains a membrane potential due to an uneven distribution of positive and negative charges across its plasma membrane. The membrane potential is measured in millivolts and quantifies the difference in charge across the membrane.
Like neurons, muscle cells are also regarded as excitable due to their capacity to change in response to stimuli, primarily due to voltage-gated ion channels embedded in their plasma membranes, which get activated by alterations in the...
4.0K
Muscle Stimulation Frequency01:22

Muscle Stimulation Frequency

1.9K
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...
1.9K
Motor Units01:13

Motor Units

3.6K
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...
3.6K

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

[Kinase-Glo luminescent kinase assay for in vitro determination of PKA activity].

Xi bao yu fen zi mian yi xue za zhi = Chinese journal of cellular and molecular immunology·2012
Same author

Functional characterization of an arrestin gene on insecticide resistance of Culex pipiens pallens.

Parasites & vectors·2012
Same author

MiR-23a inhibits myogenic differentiation through down regulation of fast myosin heavy chain isoforms.

Experimental cell research·2012
Same author

Let-7b inhibits human cancer phenotype by targeting cytochrome P450 epoxygenase 2J2.

PloS one·2012
Same author

Role of IKK/NF-κB signaling in extinction of conditioned place aversion memory in rats.

PloS one·2012
Same author

Inhibition of poly(ADP-ribose) polymerase attenuates acute kidney injury in sodium taurocholate-induced acute pancreatitis in rats.

Pancreas·2012
Same journal

Safety, feasibility and preliminary effects of Atalante exoskeleton-assisted gait training in amyotrophic lateral sclerosis: a prospective ABA pilot study.

Journal of neuroengineering and rehabilitation·2026
Same journal

Effects of repetitive transcranial magnetic stimulation on cognition through sleep slow-wave activity in older adults.

Journal of neuroengineering and rehabilitation·2026
Same journal

Peripheral and central vestibular neuromodulation improve postural control in adolescent idiopathic scoliosis: a randomized, sham-controlled, multi-arm intervention study.

Journal of neuroengineering and rehabilitation·2026
Same journal

Ankle-foot orthosis mechanical testing: a scoping review.

Journal of neuroengineering and rehabilitation·2026
Same journal

Neuromechanical synergy patterns explain metabolic efficiency differences during the sit-to-walk transition.

Journal of neuroengineering and rehabilitation·2026
Same journal

The classification of walking and phases of gait using EEG: a scoping review.

Journal of neuroengineering and rehabilitation·2026
查看所有相关文章

相关实验视频

Updated: May 22, 2025

Simultaneous Intracellular Recording of a Lumbar Motoneuron and the Force Produced by its Motor Unit in the Adult Mouse In vivo
13:07

Simultaneous Intracellular Recording of a Lumbar Motoneuron and the Force Produced by its Motor Unit in the Adult Mouse In vivo

Published on: December 5, 2012

14.6K

一种基于动力单元作用电位的方法,用于表面电肌图分解.

Chen Chen1, Dongxuan Li2, Miaojuan Xia2

  • 1State Key Laboratory of Mechanical System and Vibration, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China. cedric_chen@sjtu.edu.cn.

Journal of neuroengineering and rehabilitation
|March 15, 2025
PubMed
概括
此摘要是机器生成的。

一种基于动力单元作用电位 (MUAP) 的新方法显著提高了表面电肌图 (EMG) 分解的准确性和效率. 这种方法提供了可靠的运动单元跟踪,以改善临床诊断和神经康复.

关键词:
盲源分离器的盲源分离方式电子肌谱分解分解动力单元的动作潜力是一个动力单元的动作潜力.发动机单元跟踪跟踪器神经解码的神经解码

更多相关视频

Functional Isolation of Single Motor Units of Rat Medial Gastrocnemius Muscle
06:54

Functional Isolation of Single Motor Units of Rat Medial Gastrocnemius Muscle

Published on: December 26, 2020

5.2K
Extraction of the EPP Component from the Surface EMG
07:16

Extraction of the EPP Component from the Surface EMG

Published on: December 16, 2009

12.5K

相关实验视频

Last Updated: May 22, 2025

Simultaneous Intracellular Recording of a Lumbar Motoneuron and the Force Produced by its Motor Unit in the Adult Mouse In vivo
13:07

Simultaneous Intracellular Recording of a Lumbar Motoneuron and the Force Produced by its Motor Unit in the Adult Mouse In vivo

Published on: December 5, 2012

14.6K
Functional Isolation of Single Motor Units of Rat Medial Gastrocnemius Muscle
06:54

Functional Isolation of Single Motor Units of Rat Medial Gastrocnemius Muscle

Published on: December 26, 2020

5.2K
Extraction of the EPP Component from the Surface EMG
07:16

Extraction of the EPP Component from the Surface EMG

Published on: December 16, 2009

12.5K

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.
  • 信号处理 信号处理

背景情况:

  • 表面电肌图 (EMG) 分解对于分析肌肉电信号以了解运动神经元活动至关重要.
  • 传统的基于盲源分离 (BSS) 的技术面临着计算复杂性和运动单元 (MU) 追踪的挑战.

研究的目的:

  • 开发和验证一种基于动力单元动作潜力 (MUAP) 的新方法,用于表面EMG分解.
  • 解决基于BSS的现有技术在计算效率和MU跟踪方面的局限性.

主要方法:

  • 在卷积内核补偿框架内使用重建的MU过器从MUAP开发了一个基于MUAP的EMG分解算法.
  • 使用模拟和实验数据集评估性能,分析MU过器重建,EMG共变率和MUAP提取等因素.
  • 将拟议的方法与基于BSS的技术进行比较,包括卷积内核补偿.

主要成果:

  • 基于MUAP的方法发现了更多的MU,并且比BSS技术更准确,特别是在噪音条件下.
  • 通过增加信号复杂性和在分解过程中一致的MU跟踪,实现了卓越的性能.
  • 当从MUAP重建的MU过器直接应用时,展示了显著的计算效率.

结论:

  • 基于MUAP的方法提高了EMG分解的准确性,稳定性和效率.
  • 提供可靠的电机单元跟踪和实时处理能力.
  • 代表了在临床诊断和神经康复中进行非侵入性运动神经元分析的重大进展.