在不对称的表面刚性后,承重对称性发生变化,行走变硬
bioRxiv : the preprint server for biology
|June 6, 2025
概括
不对称的硬行走显示出改善中风幸存者的步态对称性的潜力. 这种新的方法可能有助于纠正持续的承重和推进缺陷,提供新的康复策略.
科学领域:
- 神经科学是一个神经科学.
- 生物力学 生物力学
- 康复医学 康复医学 康复医学
背景情况:
- 半对称步态不对称,特别是在承重和推进方面,是中风康复的重大挑战.
- 传统的方法,如分带跑步机训练,在解决这些持续的步行缺陷方面表现出有限的成功.
- 神经运动适应对于在中风后恢复步行对称性和功能至关重要.
研究的目的:
- 调查不对称的表面刚性的潜力,作为纠正承重和推进不对称性的新干预措施.
- 为了检查健康成年人中不对称的走路性诱导的神经运动适应.
- 评估这种方法对患有半性中风的人的可行性.
主要方法:
- 12名健康的年轻人参加了10分钟的不对称硬度行走协议,在可调硬度跑步机上.
- 在扰动之前和之后,使用仪表式跑步机测量了地面反应力 (GRF) 和时空步态参数.
- 分析的重点是确定承重,推进和脚部 flexor 活动的后果.
主要成果:
- 不对称的性行走引发了显著的后果,包括在推开过程中扰乱侧面的垂直GRF和脚部 flexor活动增加.
- 参与者表现出中位垂直GRF下降,并在扰动侧增加峰值制动GRF.
- 扰动侧的推进GRF没有增加,这表明适应主要是垂直的.
结论:
- 不对称的刚性行走引起神经运动适应,这可能会促进目标肢体的推力增加.
- 研究结果表明,这种干预措施有可能解决持续的步行缺陷,特别是在承重方面.
- 需要对患有半侧性中风和推开不对称的个体进行进一步的研究.
相关概念视频
01:26Symmetry
210
The equation of an ellipse centered at the origin defines all points whose distances from the center maintain a constant ratio between the horizontal and vertical axes. This equation results in a smooth, closed curve that extends further along the x-axis than the y-axis, giving it a horizontal orientation. Such an ellipse demonstrates three kinds of symmetry: across the x-axis, across the y-axis, and about the origin. These symmetries are essential in understanding the graph's structure and...
210
01:27Gauss's Law: Planar Symmetry
9.6K
A planar symmetry of charge density is obtained when charges are uniformly spread over a large flat surface. In planar symmetry, all points in a plane parallel to the plane of charge are identical with respect to the charges. Suppose the plane of the charge distribution is the xy-plane, and the electric field at a space point P with coordinates (x, y, z) is to be determined. Since the charge density is the same at all (x, y) - coordinates in the z = 0 plane, by symmetry, the electric field at P...
9.6K
01:11Rotation of Asymmetric Top
1.5K
By definition, a spherically symmetric body has the same moment of inertia about any axis passing through its center of mass. This situation changes if there is no spherical symmetry. Since most rigid bodies are not spherically symmetric, these require special treatment.
The relationship between the angular momentum of any rigid body and its angular velocity, both of which are vectors, involves the moment of inertia. The moment of inertia is a scalar quantity only for spherically symmetric...
The relationship between the angular momentum of any rigid body and its angular velocity, both of which are vectors, involves the moment of inertia. The moment of inertia is a scalar quantity only for spherically symmetric...
1.5K
01:35Asymmetric Lipid Bilayer
9.9K
Biological membranes show uneven distribution of different types of lipids in the inner and outer layers, resulting in transverse asymmetric membranes. The treatment of the erythrocyte membrane with the enzyme phospholipase confirmed the asymmetric nature of the lipid bilayer. The enzyme hydrolyzes lipids into fatty acids and hydrophilic groups. The phospholipase acts only on the outer layer of the membrane, while the inner layer remains intact. The phospholipase treatment resulted in 80%...
9.9K
00:57Weighted Mean
6.3K
While taking the arithmetic, geometric, or harmonic mean of a sample data set, equal importance is assigned to all the data points. However, all the values may not always be equally important in some data sets. An intrinsic bias might make it more important to give more weightage to specific values over others.
For example, consider the number of goals scored in the matches of a tournament. While computing the average number of goals scored in the tournament, it may be more important to...
For example, consider the number of goals scored in the matches of a tournament. While computing the average number of goals scored in the tournament, it may be more important to...
6.3K
01:23Collar Bearings
1.7K
Collar bearings are essential in various machines designed to support axial loads on rotating shafts. Depending on the specific application and requirements, they can be found with single or multiple collars.
1.7K