Main sequence of torsional saccadic eye movement – analysis by three-dimensional video-oculography

Abstract

Background: Quantification of main sequence is required for three-dimensional recording and analysis of eye movement using video-oculography. However, the main sequence of torsional saccade has not been reported to the best of our knowledge.

Aims/objectives: To obtain characteristics of torsional saccade using infra-red video-oculography, and to analyse the main sequence.

Material and methods: Torsional saccades of 10 healthy subjects were extracted from torsional vestibulo-ocular reflex from voluntary head rotation. Angular velocities were plotted against amplitude of each saccade to obtain the main sequence of torsional saccade.

Results: Main sequence of torsional saccade demonstrated non-linear characteristic. The adduction amplitude was significantly larger than abduction, while there was no significant difference in time constants.

Conclusions and significance: Torsional saccade demonstrates non-linear characteristic, similar to main sequence of vertical and horizontal saccades.

背景：使用视频眼图进行三维记录和眼球运动分析需要对主序列进行定量。然而, 据我们所知, 还没有关于扭转扫视的主序列的报道。

目的：使用红外视频眼图获得扭转扫视的特征, 并分析主序列。

材料和方法：从自主头部旋转的扭转性前庭眼反射中获取10名健康受试者的扭转扫视。针对每个扫视的振幅绘制角速度图, 以获得扭转扫视的主序列。

结果：扭转扫视的主序列表现出非线性特征。内收幅度明显大于外展幅度, 而时间常数无显著差异。

结论和意义：扭转扫视显示出类似于垂直和水平扫视的主序列的非线性特征。

Keywords:

• Saccade
• torsion
• main sequence
• infrared video-oculography

Disclosure statement

The authors report no conflict of interest. The authors alone are responsible for the content and writing of the article.

Additional information

Funding

This work was supported by Japan Society for the Promotion of Science (JSPS KAKENHI), grant number JP17K11314.