The effects of actuator selection on non-volitional postural responses to torso-based vibrotactile stimulation.
The effects of actuator selection on non-volitional postural responses to torso-based vibrotactile stimulation.
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DOI：
10.1186/1743-0003-10-21
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发表时间：
2013-02-13
影响因子：
5.1
通讯作者：
Sienko KH
中科院分区：
文献类型：
--
作者：
Lee BC;Martin BJ;Sienko KH
基于躯干的振动触觉反馈可以显着减少平衡受损的成年人在安静站立或对扰动的反应中的姿势摇摆。然而，自然的非意志性姿势反应的振动触觉刺激施加到躯干仍然未知。本研究的主要目标是确定，两种类型的致动器（触觉器）和在没有指令的情况下，振动触觉刺激是否会引起方向性姿势转变作为刺激位置的函数。11名健康的年轻人（20 - 29岁）被要求保持直立的直立姿势，双脚分开与臀部同宽，眼睛闭上。两种类型的触觉器，Tactaid和C2，其在设计和刺激强度上不同，被放置在皮肤上的右和左外斜肌，内斜肌，和竖脊肌肌肉在一个水平面上，大约对应于L4/L5水平。相同类型的每个触觉器在每个单独的位置被随机激活两次，并且在250 Hz的频率下同时在所有位置被激活两次，持续5 s。施加在内斜肌和竖脊肌位置的振动引起的姿势转变的刺激的方向，无论触觉类型。对于上述四个位置，在A/P和M/L方向上的身体摇摆的均方根（RMS）和功率谱密度（PSD）在振动期间也显著大于之前或之后，并且C2触觉器大于Tactaid触觉器。然而，同时激活所有的触觉或那些在外斜肌位置没有产生显着的姿势反应，无论触觉类型。结果表明，使用基于躯干的振动触觉感觉增强显示器应仔细考虑触觉类型以及纠正运动的指令。有吸引力的指导提示（“在振动的方向上移动”）与观察到的对刺激的非意志性反应兼容，并且可以在振动触觉生物反馈平衡应用期间促进姿势调整。
Torso-based vibrotactile feedback may significantly reduce postural sway in balance-compromised adults during quiet standing or in response to perturbations. However, natural non-volitional postural responses to vibrotactile stimulation applied to the torso remain unknown. The primary goal of this study was to determine, for two types of actuators (tactors) and in the absence of instruction, whether vibrotactile stimulation induces a directional postural shift as a function of stimulation location. Eleven healthy young adults (20 – 29 years old) were asked to maintain an upright erect posture with feet hip-width apart and eyes closed. Two types of tactors, Tactaid and C2, which differ in design and stimulation strength, were placed on the skin over the right and left external oblique, internal oblique, and erector spinae muscles in a horizontal plane corresponding approximately to the L4/L5 level. Each tactor of the same type was activated twice randomly for each individual location and twice simultaneously for all locations at a frequency of 250 Hz for a period of 5 s. Vibration applied over the internal oblique and erector spinae muscle locations induced a postural shift in the direction of the stimulation regardless of the tactor type. For the aforementioned four locations, the root-mean-square (RMS) and power spectral density (PSD) of the body sway in both the A/P and M/L directions were also significantly greater during the vibration than before or after, and were greater for the C2 tactors than for the Tactaid tactors. However, simultaneous activation of all tactors or those over the external oblique muscle locations did not produce significant postural responses regardless of the tactor type. The results suggest that the use of a torso-based vibrotactile sensory augmentation display should carefully consider the tactor type as well as the instruction of corrective movements. Attractive instructional cues (“move in the direction of the vibration”) are compatible with the observed non-volitional response to stimulation and may facilitate postural adjustments during vibrotactile biofeedback balance applications.
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影响因子：
2.5
作者：
Collins, DF;Refshauge, KM;Gandevia, SC
通讯作者：
Gandevia, SC
影响因子：
5.1
作者：
Lee BC;Kim J;Chen S;Sienko KH
通讯作者：
Sienko KH
DOI：
10.1111/j.1748-1716.1970.tb04783.x
发表时间：
1970-01-01
期刊：
ACTA PHYSIOLOGICA SCANDINAVICA
影响因子：
--
作者：
KNIBESTOL, M;VALLBO, AB
通讯作者：
VALLBO, AB
影响因子：
14.5
作者：
KUGELBERG, E;HAGBARTH, KE
通讯作者：
HAGBARTH, KE
影响因子：
2.4
作者：
Mortimer, Bruce J. P.;Zets, Gary A.;Cholewiak, Roger W.
通讯作者：
Cholewiak, Roger W.