Smooth eye movements with step-ramp stimuli: The influence of attention and stimulus extent
Smooth eye movements with step-ramp stimuli: The influence of attention and stimulus extent
复制标题
阶梯式刺激下的平滑眼球运动：注意力和刺激程度的影响
DOI：
10.1016/0042-6989(87)90165-9
复制
发表时间：
1987
期刊：
影响因子：
1.8
通讯作者：
J. Pola
中科院分区：
文献类型：
--
作者：
H. J. Wyatt;J. Pola
受试者被认为是在两种状态中的一种情况下进行阶跃运动的目标，主动(看着目标)或被动(类似于被动或凝视视动性眼球震颤的受试者)。目标跳到一边2度，然后以恒定的速度返回。靶标为单圆形靶标或边缘含量较高的扩展靶标。许多受试者在被动状态下表现出相当大的顺畅眼动反应，这表明初始顺畅眼动反应的相当大一部分可以独立于注意力而发生。流畅眼球运动反应的其他特征包括(I)眼球运动“抽动”(短暂、短潜伏期的顺畅眼球运动)、(Ii)过射(眼球速度大于目标速度)和(Iii)摆动。大多数反应特征可以用一个模型来解释，该模型的增益取决于受试者的注意力水平和刺激参数。
Subjects regarded targets which executed step-ramp motion in one of two conditions, either active (looking at the target) or passive (similar to the subject condition in passive or stare optokinetic nystagmus). The targets jumped 2 deg to one side and returned at a constant velocity. Targets were single round targets or extended targets with a high edge content. Many subjects showed substantial smooth eye movement responses in the passive condition, suggesting that a substantial component of initial smooth movement responses can occur independent of attention. Additional features of the smooth eye movement responses included (i) oculomotor “twitches” (brief, short-latency smooth eye movements in thestepdirection), (ii) overshoots (eye velocity greater than target velocity) and (iii) oscillations. Most of the response features can be accounted for by a model with a gain that is dependent on the subject's attentional level and on stimulus parameters.