Effect of vibrotactile stimulation of the hallux nail on segmental coordination: A secondary analysis using uncontrolled manifold analysis
Effect of vibrotactile stimulation of the hallux nail on segmental coordination: A secondary analysis using uncontrolled manifold analysis
复制标题
拇趾振动触觉刺激对节段协调的影响：使用非受控流形分析的二次分析
DOI：
10.1016/j.jbiomech.2022.111234
复制
发表时间：
2022
影响因子：
2.4
通讯作者：
Tada Mitsunori
中科院分区：
文献类型：
--
作者：
Toda Haruki;Hashimoto Yuki;Ibara Takuya;Tada Mitsunori
控制中外侧方向的质心 (CoM) 运动对于稳定行走至关重要。在行走过程中，CoM 运动是通过身体各部分的协调来调整的，这可以使用非受控流形 (UCM) 分析进行评估。 UCM 分析通过分析身体不同部位之间运动运动的变异性来评估部位协调性。拇趾甲的振动触觉刺激可以增强足底表面的感觉信息，以实现必要的运动控制。本研究旨在探讨拇趾振动触觉刺激对控制行走过程中外侧方向 CoM 运动的节段协调的影响。十三名健康男性参与了这项研究。每个拇趾钉上都附有一个振动器，压力传感器放置在拇趾球下方。当拇趾球与地板接触时，施加振动刺激。三维运动分析系统用于测量行走过程中的节段角度，UCM 分析用于评估控制 CoM 在内外侧方向运动的运动学协同作用。随后，段角度被用作基本变量。协同指数和运动噪音等不良变异性与无刺激的状态呈负相关。年轻人的振动触觉刺激对于运动噪音大、单站立阶段协同指数小的人更有效。因此，尽管应提前考虑施加振动刺激，但使用拇指指甲的振动触觉刺激的感觉输入可以立即改变运动学协同作用。
Controlling center of mass (CoM) movement in the mediolateral direction is imperative for stable walking. During walking, CoM movement is adjusted by the coordination of each body segment, which can be evaluated using uncontrolled manifold (UCM) analysis. UCM analysis evaluates segmental coordination by analyzing variablity in motor movement among the different segments of the body. The vibrotactile stimulation of the hallux nail can augment the sensory information of the plantar surface for necessary motor control. This study aims to investigate the effect of the vibrotactile stimulation of the hallux nail on segmental coordination to control CoM movement in the mediolateral direction during walking. Thirteen healthy men participated in the study. A vibrator was attached to each hallux nail, and pressure sensors were placed under the hallux balls. When the hallux ball was in contact with the floor, vibration stimulation was applied. A three-dimensional motion analysis system was used to measure the segment angles during walking, and UCM analysis was used to evaluate kinematic synergy for controlling CoM movement in the mediolateral direction. Subsequently, segment angles were used as an elemental variable. The synergy index and bad variability as motor noise were negatively related to the status without the stimulation. Vibrotactile stimulation in young people was more effective for people with large motor noise and a small synergy index during the single-stance phase. Thus, kinematic synergy can be immediately changed by sensory input using vibrotactile stimulation of the hallux nail, although applying vibration stimulation should be considered in advance.