Henry D F, DiBartolomeo J D
School of Communicative Disorders, University of Wisconsin, Stevens Point 54481.
Otolaryngol Head Neck Surg. 1993 Dec;109(6):975-87. doi: 10.1177/019459989310900602.
Norms and test-retest data from 20 persons with normal hearing and balance function were obtained for bithermal caloric (BC) using a closed-loop irrigator, sinusoidal harmonic acceleration (SHA) and active head rotation (AHR) tests. Each subject was tested twice with each test, with at least 24 hours between retest. Results of BC testing indicate that a unilateral weakness of 30% should be present to confidently identify a significant inter-ear difference when using a closed-loop irrigator for stimulus. Test-retest correlations of unilateral weakness were extremely poor, reflecting the potential for considerable variability with this test. With the exception of asymmetry measures at 0.01 and 0.02 Hz, SHA gain, phase, and asymmetry are very similar to previously published norms. Test-retest correlations were generally better than BC correlations, with phase measures having the highest test-retest correlations. AHR norms were obtained in three conditions, with eyes open and starting at a stationary target (AHR-EO), with eyes closed (AHR-EC), and with eyes open and fixated on a target moving synchronously with the head (AHR-FX). AHR-EO mean gain and phase were slightly less than that reported by other researchers, possibly as a result of differences in analysis algorithms, and had the poorest test-retest correlations. AHR-EC gain and phase were much more variable than AHR-EO between subjects, but showed very high test-retest correlations. AHR-FX gain, phase, and asymmetry are similar to those reported previously and have slightly better test-retest correlations than AHR-EO.
我们使用闭环冲洗器、正弦谐波加速度（SHA）和主动头部旋转（AHR）测试，获取了20名听力和平衡功能正常者的冷热试验（BC）的标准值以及重测数据。每个测试对每位受试者进行两次，重测之间至少间隔24小时。BC测试结果表明，在使用闭环冲洗器进行刺激时，若要可靠地识别双耳之间的显著差异，单侧减弱应达到30%。单侧减弱的重测相关性极差，这反映了该测试存在较大变异性的可能性。除了0.01和0.02赫兹处的不对称测量值外，SHA增益、相位和不对称性与先前公布的标准值非常相似。重测相关性总体上优于BC相关性，其中相位测量的重测相关性最高。在三种条件下获得了AHR标准值，分别是睁眼并从静止目标开始（AHR-EO）、闭眼（AHR-EC）以及睁眼并注视与头部同步移动的目标（AHR-FX）。AHR-EO的平均增益和相位略低于其他研究人员报告的值，这可能是分析算法不同导致的，并且其重测相关性最差。AHR-EC的增益和相位在受试者之间的变异性比AHR-EO大得多，但显示出非常高的重测相关性。AHR-FX的增益、相位和不对称性与先前报告的相似，并且其重测相关性比AHR-EO略好。
