Myers S F
Department of Otolaryngology, Wayne State University, Detroit, Michigan.
J Vestib Res. 1992 Summer;2(2):123-31.
Analysis of low-frequency (0.01 to 0.16 Hz), sinusoidal rotary chair responses of 24 patients with bilateral caloric weakness revealed a wide range of vestibulo-ocular reflex (VOR) impairment. The rotational stimuli presented allowed characterization of the degree of VOR impairment from severe to no impairment even in patients with absent responses to ice water caloric irrigation. Five patterns of responses were described, which helps to explain the lack of correlation often seen between caloric and rotary chair test results, especially when rotational testing does not extend down to at least 0.02 Hz. Bilateral caloric weakness was confirmed in 79% and 71% of patients by test frequencies of 0.01 and 0.02 Hz. Rotational stimuli of 0.04, 0.08, and 0.16 Hz gave notably poorer performance with 54%, 50%, and 29% confirmation.
对24例双侧冷热试验减弱患者的低频（0.01至0.16赫兹）正弦旋转椅反应进行分析，结果显示前庭眼反射（VOR）存在广泛损伤。所呈现的旋转刺激能够对VOR损伤程度进行分级，从严重损伤到无损伤，即便对于冰水冷热灌注无反应的患者亦是如此。文中描述了五种反应模式，这有助于解释冷热试验和旋转椅试验结果之间常常缺乏相关性的现象，尤其是当旋转测试频率未低至至少0.02赫兹时。通过0.01和0.02赫兹的测试频率，分别有79%和71%的患者被确诊为双侧冷热试验减弱。0.04、0.08和0.16赫兹的旋转刺激所得到的结果明显较差，确诊率分别为54%、50%和29%。
