Three-Dimensional Analysis of Slow and Rapid Eye movements.

1. 为了保持平衡，有输出到四肢和躯干肌肉，还有眼肌。在这项研究中，我们将研究眼动来阐明平衡功能的一部分。眼球运动是通过眼球中心沿三个轴进行的水平、垂直和扭转的三维旋转运动。为了正确地研究眼球运动，三维分析是必不可少的。通过1996年至1997年的研究，对三维分析系统进行了改进。该系统在1998年实际应用后，对软件进行了升级改造。该三维分析系统现已成为临床应用的工具。眼球运动包括慢速（追逐）和快速（扫视）运动。在正常受试者中，我们对这两种眼球运动进行了三维研究。采用高速CCD相机对眼球快速运动进行分析。包括扭转运动在内的前庭诱发的慢眼动表现出与其他慢眼动相同的特征。前庭诱发眼震的快速眼成分在水平运动和垂直运动中表现出相同的特征。另一方面，扭眼运动的行为与这两个组成部分相比可能表现出不同的运动。

1. For maintaining the equilibrium, there are the outputs to the extremities and trunk muscles, and also the eye muscles. In this study, we are going to investigate the eye movements to clarify a part of the equilibrium function. The eye movement is the three-dimensional rotatory movements along three axes through the center of eye ball, which are horizontal, vertical, and torsional. In order to investigate the eye movements properly, thus the three dimensional analysis is essential. The improvement of the 3D analysis system had been done through the studies during 1996 to 1997. The upgrade changes of this soft ware have been done after actual application of this system to the subjects in 1998. This 3D analysis system has become clinically applicable tool now.2. The eye movement contains slow (pursuit) and rapid (saccade) movements. In normal subjects, we investigated these two eye movements three dimensionally. To analyze the rapid eye movements, the high speed CCD camera was used. The slow vestibular evoked eye movements including torsional movements exhibited same characteristic which have been observed other slow eye movements. The rapid eye component which are quick phase of vestibular evoked nystagmus showed same characteristics in horizontal and vertical movements. On the other hand, the behavior of the torsional eye movements showed possibly different movements compared to those two components.