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相关概念视频

Comparison Between Electrical And Gravitational Forces01:24

Comparison Between Electrical And Gravitational Forces

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There are four fundamental forces in nature: the gravitational force, the electromagnetic force, the strong nuclear force, and the weak nuclear force. To compare the numerical strengths of the first two, take two particles of the same kind. Since electrons are fundamental particles, they are a good example.
Since both are inverse square law forces, the distance gets canceled when the ratio of the two forces is considered. Instead, the ratio of the electrical and gravitational forces depends on...
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Intermolecular Forces03:13

Intermolecular Forces

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Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen...
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Isotonic and Isometric Muscle Contractions01:22

Isotonic and Isometric Muscle Contractions

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Two primary types of muscle contractions are isotonic and isometric, each serving unique functions and involving distinct mechanisms. Both isotonic and isometric contractions are integral to the body's complex system of movement and stability. Isotonic exercises contribute significantly to functional strength and movement, while isometric contractions are crucial for maintaining posture and joint stability.
Isotonic contractions
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The Sense of Self: Reflected Self-Appraisal and Social Comparison02:57

The Sense of Self: Reflected Self-Appraisal and Social Comparison

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According to Charles Cooley, we base our image on what we think other people see (Cooley 1902). We imagine how we must appear to others, then react to this speculation. We don certain clothes, prepare our hair in a particular manner, wear makeup, use cologne, and the like—all with the notion that our presentation of ourselves is going to affect how others perceive us. We expect a certain reaction, and, if lucky, we get the one we desire and feel good about it. But more than that, Cooley...
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Renal Drug Clearance: Comparison Between Renal Excretion Methods01:08

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Renal clearance is a critical parameter encompassing kidney filtration, secretion, and reabsorption processes. It is calculated using a specific equation to determine the rate at which the kidneys clear a drug.
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What are Estimates?01:06

What are Estimates?

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It isn't easy to measure a parameter such as the mean height or the mean weight of a population. So, we draw samples from the population and calculate the mean height or mean weight of the individuals in the sample. This sample data acts as a representative measure of the population parameter. These sample statistics are known as estimates. 
The estimate for the mean of a sample is denoted by ͞x, whereas the mean of the population is designated as μ. Further, parameters such...
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相关实验视频

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Maximum Isometric Tetanic Force Measurement of the Tibialis Anterior Muscle in the Rat
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基于稀疏声谱测定对比力估计:方法和特征的比较.

Anne Tryphosa Kamatham1, Meena Alzamani2, Allison Dockum2

  • 1Centre for Biomedical Engineering, Indian Institute of Technology Delhi, New Delhi 110016 India.

IEEE transactions on medical robotics and bionics
|January 22, 2026
PubMed
概括

这项研究引入了超声图 (超声成像) 来估计肌肉力量,克服了表面电肌图 (sEMG) 的局限性. 使用四个传感器的高斯过程回归准确地预测了连续的等比力.

关键词:
一种模式的超声波.估计力量的估计力.感知肌肉活动 感知肌肉活动超声微图 (sonomyography) 是一种超声微图.

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Isometric and Eccentric Force Generation Assessment of Skeletal Muscles Isolated from Murine Models of Muscular Dystrophies
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科学领域:

  • 生物力学 生物力学
  • 医疗成像医学成像
  • 康复工程 康复工程 康复工程

背景情况:

  • 对关节和肌肉力量的非侵入性估计对于临床和研究应用至关重要.
  • 表面电肌图 (sEMG) 受到信号噪声比较差和空间时间特异性的限制,无法准确估计力.
  • 传统的超声波方法用于力预测是计算复杂的.

研究的目的:

  • 开发一种基于线下声势学的方法,用稀疏的超声数据来估计连续的同度肌肉力量.
  • 与现有的超声波方法相比,减少特征维度和计算复杂性.
  • 评估回归模型,并评估可穿戴式超声波系统的可行性.

主要方法:

  • 从B模式超声波图像中开发了使用A模式扫描线的离线超声波方法.
  • 隔离了与解剖学相关的特征,以减少特征空间.
  • 评估了四种回归方法 (包括高斯过程回归) 用于力预测.
  • 通过改变传感器位置和数量来模拟可穿戴系统的可行性.

主要成果:

  • 高斯过程回归模型在预测连续力水平方面表现出卓越的性能.
  • 在离线设置中,只使用四个相等空间的传感器,就能实现准确的力预测.
  • 提出的方法显著降低了计算复杂度.

结论:

  • 声谱为肌肉力量估计提供了对sEMG的强大和计算效率高的替代方案.
  • 用稀疏的超声数据进行高斯过程回归对于连续的同位力力预测是有效的.
  • 这些发现支持开发实用,可穿戴的基于声势学的力预测系统.