Gleason G, Schor C, Lunn R, Maxwell J
Human Engineering Division, Crew System Directorate, Armstrong Laboratory, Wright Patterson AFB, OH 45433-6573.
Vision Res. 1993 Jan;33(1):65-71. doi: 10.1016/0042-6989(93)90059-6.
We investigated the contribution of fixation phoria and dynamic processes to short term (1 hr) nonconjugate adaptation of vertical pursuits. Unequal aftereffects were observed in vertical phoria measured during stationary gaze and during pursuits (static fixation and pursuit phorias) demonstrating direction-specific aftereffects of pursuit phoria that were not evident in measures of fixation phoria. A linear model describes the combination of fixation phoria and three dynamic direction-specific components which include a gain component that determines nonconjugate velocity, a phase component that determines the relative position of binocular pursuits, and a small position specific pursuit phoria adjustment process. Larger position-specific variations of fixation phoria appear to compensate for inappropriate or incomplete adaptive changes produced by two of the dynamic mechanisms which are not position specific.
我们研究了注视隐斜和动态过程对垂直跟踪短期（1小时）非共轭适应性的影响。在静止注视和跟踪过程中测量的垂直隐斜（静态注视隐斜和跟踪隐斜）中观察到了不等的后效应，这表明跟踪隐斜存在方向特异性后效应，而在注视隐斜测量中并不明显。一个线性模型描述了注视隐斜和三个动态方向特异性成分的组合，这三个成分包括一个决定非共轭速度的增益成分、一个决定双眼跟踪相对位置的相位成分，以及一个小的位置特异性跟踪隐斜调整过程。注视隐斜较大的位置特异性变化似乎补偿了两种非位置特异性动态机制产生的不适当或不完全的适应性变化。
