Department of Otolaryngology, Faculty of Medicine, The University of Tokyo, Japan.
Clin Neurophysiol. 2010 Aug;121(8):1279-84. doi: 10.1016/j.clinph.2010.02.149. Epub 2010 Mar 15.
To investigate whether disorders of the inferior vestibular nerve (IVN) system affect postural stability.
Two-legged stance tasks were performed by patients with unilateral peripheral vestibulopathy (n=108) in four conditions: eyes open or eyes closed, with or without foam rubber. We examined six parameters: the velocity of movement of the center of pressure and the envelopment area determined by tracing the movement in the eyes closed/foam rubber condition, Romberg's ratio of velocity and area with foam rubber, and the foam ratios (ratios of a measured parameter with to without the foam rubber) of velocity and area with eyes closed.
The values of all six parameters were significantly higher in patients with unilateral vestibulopathy whose cervical vestibular evoked myogenic potentials (cVEMPs) were abnormal compared with healthy controls (p<0.01). Four of the six parameters showed significantly higher values (p<0.05) in patients with unilateral abnormal cVEMPs in the presence of normal caloric responses compared with the controls.
Foam posturography is useful for making a preliminary assessment of unilateral vestibulopathy with abnormal cVEMPs. Selective damage of the unilateral IVN system could affect postural stability.
We proved the influence of the disorder of the IVN system on postural stability.
研究下前庭神经（IVN）系统障碍是否会影响姿势稳定性。
108 例单侧周围性前庭病变患者在 4 种条件下进行双腿站立任务：睁眼或闭眼，有或无泡沫橡胶。我们检查了 6 个参数：闭眼/泡沫橡胶条件下压力中心运动速度和包络面积，有泡沫橡胶时 Romberg 速度和面积比，闭眼时速度和面积的泡沫比（有泡沫橡胶时测量参数与无泡沫橡胶时的比值）。
与健康对照组相比，cVEMP 异常的单侧前庭病变患者的所有 6 个参数值均明显更高（p<0.01）。在存在正常冷热反应的情况下，单侧异常 cVEMP 的患者中有 4 个参数的数值明显更高（p<0.05）。
泡沫姿势描记术有助于对单侧前庭病变伴异常 cVEMP 进行初步评估。单侧 IVN 系统的选择性损伤可能会影响姿势稳定性。
我们证明了 IVN 系统障碍对姿势稳定性的影响。
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