Department of Otology and Laryngology, Harvard Medical School, Boston, Massachusetts 02114, USA.
J Neurosci. 2012 Sep 26;32(39):13537-42. doi: 10.1523/JNEUROSCI.2157-12.2012.
To assess the contributions of the vestibular system to whole-body motion discrimination in the dark, we measured direction recognition thresholds as a function of frequency for yaw rotation, superior-inferior translation ("z-translation"), interaural translation ("y-translation"), and roll tilt for 14 normal subjects and for 3 patients following total bilateral vestibular ablation. The patients had significantly higher average threshold measurements than normal (p < 0.01) for yaw rotation (depending upon frequency, 5.4× to 15.7× greater), z-translation (8.3× to 56.8× greater), y-translation (1.7× to 4.5× greater), and roll tilt (1.3× to 3.0× greater)--establishing the predominant contributions of the vestibular system for these motions in the dark.
为了评估前庭系统对黑暗中全身运动辨别能力的贡献，我们测量了 14 名正常受试者和 3 名全双侧前庭切除术后患者的水平旋转（yaw rotation）、上下平移（superior-inferior translation，“z 平移”）、两耳间平移（interaural translation，“y 平移”）和倾斜（roll tilt）的频率识别阈值。患者的平均阈值测量值明显高于正常（p<0.01），分别为水平旋转（取决于频率，大 5.4 到 15.7 倍）、z 平移（大 8.3 到 56.8 倍）、y 平移（大 1.7 到 4.5 倍）和倾斜（大 1.3 到 3.0 倍），从而确定了前庭系统在这些运动中对黑暗的主要贡献。
