Effects of galvanic vestibular stimulation on human posture and perception while standing
Effects of galvanic vestibular stimulation on human posture and perception while standing
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电前庭刺激对人体站立姿势和知觉的影响
DOI：
10.1111/j.1469-7793.2003.01033.x
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
R. Fitzpatrick
中科院分区：
文献类型：
--
作者：
D. Wardman;Janet L. Taylor;R. Fitzpatrick
本研究探讨了三个假说，已提出解释的影响，前庭电刺激（GVS）在站立的人类受试者。第一个假设重新对齐到改变的垂直表示。在不同稳定性条件下产生的GVS诱发的身体倾斜与受试者通过两种方式（视线和操纵）表示的垂直感知进行了比较。GVS产生的身体倾斜，增加在不稳定的条件下，但没有差异，在任何条件下的垂直感知。第二个假设是改变的前庭信号被解释为支撑表面的倾斜。通过倾斜支撑表面引起的姿势反应与不同稳定性条件下的GVS反应进行了比较。这些反应是不同的，特别是对于运动方向相反的下半身。站在泡沫上增强GVS反应，而双脚分开站立增强平台倾斜反应。第三个假设是，GVS产生了一种运动的错觉，这导致了相反方向的反应。在GVS期间的运动感知被确定在站立和固定的主题。虽然不动的受试者经历了与摇摆反应相反方向的运动错觉，但这只发生在长时间刺激之后，并且从未发生过受试者准确报告摇摆的真实方向的情况。因此，结果不支持任何这些建议。相反，他们和其他观察结果支持一种更简单的解释，即GVS信号与头部运动一致，并引起自动响应以稳定头部在空间中。
This study examines three hypotheses that have been proposed to explain the effects of galvanic vestibular stimulation (GVS) in standing human subjects. The first assumes realignment to an altered representation of vertical. GVS‐evoked body tilt produced under conditions of different stability was compared with perceptions of the vertical which subjects indicated by two means, a visual line and a manipulandum. GVS produced body tilt that increased in unstable conditions but there were no differences in the perceived vertical in any condition. The second hypothesis is that the altered vestibular signal is interpreted as a tilt of the support surface. The postural response evoked by tilting the support surface was compared with the GVS response under conditions of varying stability. These responses were different, particularly for the lower body where movements were oppositely directed. Standing on foam augmented GVS responses whereas standing with feet apart augmented platform‐tilt responses. The third hypothesis is that GVS produces an illusion of movement, and this causes a reaction in the opposite direction. Perception of movement during GVS was determined in standing and immobilised subjects. Although immobilised subjects experienced illusions of movement in the direction opposite the sway response, this only happened after long periods of stimulation and never for standing where subjects accurately reported the true direction of sway. Thus, the results do not support any of these proposals. Instead, they and other observations support a simpler interpretation that the GVS signal is consistent with head movement and evokes an automated response to stabilise the head in space.
前庭脊髓控制姿势。
影响因子：
--
作者：
Horak,FayB;Buchanan,John;Creath,Robert;Jeka,John
通讯作者：
Jeka,John