Detecting postural responses to sinusoidal sensory inputs: a statistical approach.
Detecting postural responses to sinusoidal sensory inputs: a statistical approach.
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检测对正弦感觉输入的姿势反应：统计方法。
DOI：
10.1109/tnsre.2004.834203
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
Loughlin,PatrickJ
中科院分区：
文献类型：
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作者：
Sparto,PatrickJ;Jasko,JeffreyG;Loughlin,PatrickJ
理解体位控制中感觉统合的一种常见方法是对涉及平衡的感觉系统提供正弦扰动。然而，并不是所有的实验对象都对扰动有反应。确定是否发生了响应通常是定性的，例如，通过目视检查功率谱。在本文中，我们提出了一种用于量化是否存在姿势摇摆响应的统计检验的应用。该测试使用f统计量来确定在刺激频率下姿势摇摆数据是否存在显著的功率。为了描述该方法的应用，20名受试者在0.1和0.25 Hz下观看正弦前后（A-P）光流，同时测量他们的A-P头部平移。实验结果表明，12/20受试者在0.1 Hz和13/20受试者在0.25 Hz的刺激频率下，体位反应显著。
A common way for understanding sensory integration in postural control is to provide sinusoidal perturbations to the sensory systems involved in balance. However, not all subjects exhibit a response to the perturbation. Determining whether or not a response has occurred is usually done qualitatively, e.g., by visual inspection of the power spectrum. In this paper, we present the application of a statistical test for quantifying whether or not a postural sway response is present. The test uses an F-statistic for determining if there is significant power in postural sway data at the stimulus frequency. In order to describe the application of this method, 20 subjects viewed sinusoidal anterior-posterior (A-P) optic flow at 0.1 and 0.25 Hz, while their A-P head translation was measured. The test showed that significant postural responses were detected at the stimulus frequency in 12/20 subjects at 0.1 Hz and 13/20 subjects at 0.25 Hz.