Head roll dependent variability of subjective visual vertical and ocular counterroll
Head roll dependent variability of subjective visual vertical and ocular counterroll
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DOI：
10.1007/s00221-009-1823-4
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发表时间：
2009-06-01
影响因子：
2
通讯作者：
Straumann, Dominik
中科院分区：
文献类型：
--
作者：
Tarnutzer, Alexander A.;Bockisch, Christopher J.;Straumann, Dominik
我们比较了主观视觉垂直（SVV）和静态眼反滚（OCR）的变异性，并假设测量值之间的相关性，因为它们共享黄斑输入。在6名受试者中，在各种全身滚转位置[直立、右耳向下45 A度（RED）和75 A度RED]下同时测量SVV和OCR。OCR的增益分别为-0.18（45 A度RED）和-0.12（75 A度RED），而SVV任务中身体侧倾的补偿增益分别为-1.11（45 A度RED）和-0.96（75 A度RED）。标准化SVV和OCR变异性无显著差异（P > 0.05），即，两者都随着滚动的增加而增加。SVV和OCR之间存在显著的相关性（R（2）= 0.80，slope = 0.29），尽管OCR的增益与SVV的增益不同，但OCR的试验间变异性遵循SVV变异性中观察到的相同的滚动依赖调制。我们建议，在变异的相似性反映了一个共同的耳石输入，然而，这是受到不同的中央处理，以确定SVV和OCR的增益。
We compared the variability of the subjective visual vertical (SVV) and static ocular counterroll (OCR), and hypothesized a correlation between the measurements because of their shared macular input. SVV and OCR were measured simultaneously in various whole-body roll positions [upright, 45A degrees right-ear down (RED), and 75A degrees RED] in six subjects. Gains of OCR were -0.18 (45A degrees RED) and -0.12 (75A degrees RED), whereas gains of compensation for body roll in the SVV task were -1.11 (45A degrees RED) and -0.96 (75A degrees RED). Normalized SVV and OCR variabilities were not significantly different (P > 0.05), i.e., both increased with increasing roll. Moreover, a significant correlation (R (2) = 0.80, slope = 0.29) between SVV and OCR variabilities was found. Whereas the gain of OCR is different from the gain of SVV, trial-to-trial variability of OCR follows the same roll-dependent modulation observed in SVV variability. We propose that the similarities in variability reflect a common otolith input, which, however, is subject to distinct central processing for determining the gain of SVV and OCR.