Ocular torsion induced by static and dynamic visual stimulation and static whole body roll
Ocular torsion induced by static and dynamic visual stimulation and static whole body roll
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DOI：
10.1007/bf02439726
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发表时间：
1997-01-01
影响因子：
2.6
通讯作者：
Vogels, R
中科院分区：
文献类型：
--
作者：
Kingma, H;Stegeman, P;Vogels, R
本文应用实时红外视频眼电描记术对12名正常人的眼球扭转进行了研究。通过视觉刺激或静态全身滚动（有或无视觉定向（“头固定”或“地球固定”））诱导眼球扭转。视觉刺激是由一个水平光栅，在额状面正弦振荡。振荡频率从0到0.6 Hz变化，振幅从6度到33度变化。通过在倾斜装置（头部固定）或额状面（地面固定）的墙壁上安装32 1x照明水平光栅，建立全身滚动期间的视觉定向。在约0.2 Hz时达到最大视觉诱导的眼球扭转增益。在光栅的静态（0 Hz）视觉倾斜中没有观察到眼睛扭转。最大增益在6度和10度之间的振幅处约为0.36。眼扭转增益随振幅和频率（> 0.2Hz）的增加而降低。静态全身滚动在黑暗中顺时针方向和逆时针方向高达180度诱导静态眼球反滚动，最大幅度为12度，最大增益为0.22。增益随着滚转的增加而减小，在180度处下降到零。无论是头部或地面固定的视觉方向并不影响的幅度或增益的身体滚动引起的眼反滚动。解释的结果，提高临床平衡石测试的可靠性和了解的过程中涉及晕动病。
By means of real-time infra-red video-oculography we studied eye torsion in 12 normal healthy subjects. Ocular torsion was induced by visual stimulation or static whole body roll with and without visual orientation (''head-fixed'' or ''earth-fixed''). Visual stimulation was achieved by a horizontal grating that oscillated sinusoidally in a frontal plane. The oscillation frequency varied from 0 to 0.6 Hz while amplitude varied from 6 degrees to 33 degrees. Visual orientation during whole body roll was established by mounting a 32 1x illuminated horizontal grating either on a tilting device (head-fixed) or on the wall in the frontal plane (earth-fixed). Maximum visual-induced eye torsion gain was reached at about 0.2 Hz. No eye torsion was observed in static (0 Hz) visual tilts of the grating. Maximum gain was about 0.36 at amplitudes between 6 degrees and 10 degrees. Eye torsion gain decreased with increasing amplitude and increasing frequency (> 0.2 Hz). Static whole body roll in the dark up to 180 degrees clockwise and counterclockwise induced static ocular counter rolling with a maximum amplitude of 12 degrees and a maximum gain of 0.22. Gain decreased with increasing roll down to zero at 180 degrees. Visual orientation with either head or earth fixed did not affect the amplitude or gain of the body roll induced ocular counter-rolling. The results are interpreted in terms of improving the reliability of clinical statolith testing and understanding the processes involved in motion sickness.