Morrow M J, Lamb N L
Department of Neurology, Olive View/UCLA Medical Center, Sylmar 91342-1495, USA.
Exp Brain Res. 1996 Sep;111(2):262-70. doi: 10.1007/BF00227303.
We measured smooth pursuit and anticipatory smooth eye movements in four normal subjects, using step-ramp stimuli. Between trials, subjects fixated a motionless central target which disappeared before, after, or at the same time as the ramp stimulus appeared. We found that gaps or overlaps in the relative timing of fixation target offset and ramp onset neither expedited nor delayed the initiation of smooth pursuit. In contrast, anticipatory and smooth pursuit eye accelerations were influenced by the presence of a stationary foveal target; both were significantly higher when the fixation stimulus disappeared before ramp onset than when it disappeared after ramp onset.
我们使用阶跃斜坡刺激，对四名正常受试者的平稳跟踪和预期性平稳眼动进行了测量。在试验之间，受试者注视一个静止的中央目标，该目标在斜坡刺激出现之前、之后或同时消失。我们发现，注视目标偏移和斜坡开始之间的相对时间间隔中的间隙或重叠，既不会加速也不会延迟平稳跟踪的启动。相比之下，预期性和平稳跟踪眼加速度受中央凹固定目标的存在影响；当注视刺激在斜坡开始前消失时，两者均显著高于在斜坡开始后消失时。
