Torsional component of microsaccades during fixation and quick phases during optokinetic stimulation.
Torsional component of microsaccades during fixation and quick phases during optokinetic stimulation.
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DOI：
10.16910/jemr.13.5.5
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发表时间：
2020-10-20
影响因子：
2.1
通讯作者：
Otero-Millan J
中科院分区：
文献类型：
--
作者：
Sadeghpour S;Otero-Millan J
虽然许多研究已经表征了视觉注视过程中的眼球运动，包括微眼跳，但在大多数情况下，只记录和分析了水平和垂直分量。因此，人们对微扫视的扭转成分知之甚少。我们利用新开发的软件和硬件来记录注视和扭转视动刺激过程中眼睛围绕三个旋转轴的运动。结果发现，眼球运动时微眼跳扭转分量的平均幅度为0.34±0.07度，运动速度遵循一个主序列，其斜率与水平分量和垂直分量相当。我们还发现，微扫视过程中扭转位移的大小与水平分量有关，而与垂直分量无关。在视动刺激存在的情况下，诱发眼球震颤，与固定刺激时产生的微眼跳相比，产生更频繁和更大的扭转快时相。速度越高，快相的扭转分量和垂直收敛分量越大。此外，我们的结果验证和显示了在桌面安装的设置中使用视频眼球跟踪来记录扭转眼球运动的可行性。
While many studies have characterized the eye movements during visual fixation, includ-ing microsaccades, in most cases only horizontal and vertical components have been rec-orded and analyzed. Thus, little is known about the torsional component of microsaccades. We took advantage of a newly developed software and hardware to record eye movements around the three axes of rotation during fixation and torsional optokinetic stimulus. We found that the average amplitude of the torsional component of microsaccades during fixation was 0.34 ± 0.07 degrees with velocities following a main sequence with a slope comparable to the horizontal and vertical components. We also found the size of the tor-sional displacement during microsaccades was correlated with the horizontal but not the vertical component. In the presence of an optokinetic stimulus a nystagmus was induced producing a more frequent and larger torsional quick phases compared to microsaccades produced during fixation with a stationary stimulus. The torsional component and the vertical vergence component of quick phases grew larger with higher velocities. Addition-ally, our results validate and show the feasibility of recording torsional eye movements using video eye tracking in a desktop mounted setup.
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影响因子：
1.8
作者：
Jacobs, JB;Dell'Osso, LF
通讯作者：
Dell'Osso, LF
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ENRIGHT, JT
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通讯作者：
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