A moving stimulus is normally required to elicit smooth pursuit eye movements that serve to keep the retinal image of moving objects on the fovea. Recent experiments have shown that in cases where motion cues are ambiguous, pursuit eye movements tend to agree in direction and speed with the percept of motion. Here, we exploit the motion aftereffect (MAE) to show for the first time that smooth pursuit eye movements can also be elicited by the illusory motion of a stationary stimulus. After prolonged exposure to a moving stimulus, subjects show reliable pursuit of a physically stationary stimulus that is perceived to be moving. Conversely, the eyes remain stationary when viewing a physically moving stimulus that is perceived to be stationary. The MAE biases smooth eye movements in a way that agrees with the constant offset that is required to null the MAE perceptually. The agreement between perception and pursuit holds over a variety of stimulus conditions that modulate the magnitude of the MAE.

译文

通常需要运动刺激来引发平滑的追踪眼球运动,从而将运动物体的视网膜图像保持在中央凹上。最近的实验表明,在运动线索不明确的情况下,追求眼球的运动往往在方向和速度上与运动的感知一致。在这里,我们利用运动后效 (MAE) 首次表明,平稳刺激的虚幻运动也可以引起平滑的追逐眼球运动。长时间暴露于运动刺激后,受试者表现出对被认为正在运动的物理静止刺激的可靠追求。相反,当观察被认为是静止的物理运动刺激时,眼睛保持静止。MAE以与感知MAE无效所需的恒定偏移量一致的方式偏置平滑的眼睛运动。感知与追求之间的一致性适用于调节MAE大小的各种刺激条件。

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