Vestibular disturbance at frequencies above 1 Hz affects human postural control.
Vestibular disturbance at frequencies above 1 Hz affects human postural control.
复制标题
频率高于 1 Hz 的前庭干扰会影响人类的姿势控制。
DOI：
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发表时间：
1994
影响因子：
1.4
通讯作者：
Rolf Johansson
中科院分区：
文献类型：
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作者：
H. Petersen;M. Magnusson;P. Fransson;Rolf Johansson
在11名正常受试者中研究了原发性前庭障碍对姿势控制的影响，这些受试者暴露于双极双耳前庭神经电刺激的扰动。刺激包括频率为0.2、0.3、0.5、1.0、1.5、2.0、3.0和4.0 Hz的30 s正弦电流刺激，电流为+/- 1 mA，受试者睁着或闭着眼睛站立，用测力平台记录诱发的反应。与静息值（即无刺激）相比，在闭眼条件下测试的所有频率和在睁眼条件下测试的0.2、0.5、1.0、3.0和4.0 Hz频率下，横向身体摇摆的方差显著更大;使用截止频率为0.1 Hz的高通滤波器，在频率0.2，0.3，0.5，在闭眼条件下为1.0和2.0 Hz，在睁眼条件下为0.5和2.0 Hz。这些研究结果表明，在侧平面前庭输入的影响，并可能有助于人类的姿势控制在一个更广泛的频率范围比以往的研究结果所建议的。矢状面身体摇摆的趋势相似。此外，视觉贡献似乎使受试者能够抑制仅在较低频率范围内（这里在0.2和0.3Hz）引起横向身体摇摆的前庭输入，但是关于在宽得多的频率范围内（这里在除1.5Hz之外的所有测试频率下）伴随的矢状身体摇摆。（250字处删节）
The effect of primary vestibular disturbance on postural control was investigated in 11 normal subjects exposed to perturbation by bi-polar binaural galvanic stimulation of the vestibular nerve. The stimulus consisted of 30 s of sinusoidal galvanic stimulation at a frequencies of 0.2, 0.3, 0.5, 1.0, 1.5, 2.0, 3.0 and 4.0 Hz, with a current of +/- 1 mA, the subject standing with open or closed eyes, the response evoked being recorded with a force platform. As compared with resting values, i.e. no stimuli, variance of lateral body sway was significantly greater at all frequencies tested in the closed eyes condition and at frequencies of 0.2, 0.5, 1.0, 3.0 and 4.0 Hz in the open eyes condition; using a high pass filter with a cut-off frequency of 0.1 Hz, variance of lateral body sway was significantly greater at frequencies 0.2, 0.3, 0.5, 1.0 and 2.0 Hz in the closed eyes condition and at frequencies 0.5 and 2.0 Hz in the open eyes condition. These findings suggest that in the lateral plane vestibular input affects and probably contributes to human postural control over a wider frequency range than suggested by findings in previous studies. The trends in sagittal body sway were similar. Moreover, the visual contribution appears to enable the subject to suppress vestibular input causing lateral body sway only in the lower frequency range (here at 0.2 and 0.3 Hz), but with regard to the concomitant sagittal body sway at a much wider range of frequencies (here at all frequencies tested except 1.5 Hz).(ABSTRACT TRUNCATED AT 250 WORDS)