Kao G W, Morrow M J
Department of Neurology, Olive View/UCLA Medical Center, Sylmar 91342.
Vision Res. 1994 Nov;34(22):3027-36. doi: 10.1016/0042-6989(94)90276-3.
We measured anticipatory smooth eye movements and smooth pursuit initiation with predictable and unpredictable step-ramp stimuli in normal subjects. Subjects generated anticipatory eye motion before targets moved and during intervals when targets suddenly disappeared. Expectations of target trajectory modified pursuit acceleration and latency, demonstrating that pursuit initiation is not governed by visual inputs alone. Anticipatory smooth eye movements and predictive contributions to smooth pursuit had similar accelerations and velocities. Anticipation and pursuit initiation varied in parallel between subjects; anticipation was stronger in subjects who generated faster smooth pursuit. These findings imply that anticipatory and smooth pursuit eye movements are governed by a common mechanism.
我们在正常受试者中，使用可预测和不可预测的阶跃斜坡刺激来测量预期性平滑眼球运动和平滑跟踪启动。受试者在目标移动之前以及目标突然消失的间隔期间产生预期性眼球运动。对目标轨迹的预期会改变跟踪加速度和潜伏期，这表明跟踪启动并非仅由视觉输入控制。预期性平滑眼球运动和平滑跟踪的预测性贡献具有相似的加速度和速度。受试者之间的预期和跟踪启动呈平行变化；在产生更快平滑跟踪的受试者中，预期更强。这些发现意味着预期性和平滑跟踪眼球运动受共同机制控制。
