Saccades can be aimed at the spatial location of targets flashed during pursuit.
Saccades can be aimed at the spatial location of targets flashed during pursuit.
复制标题
扫视可以瞄准追踪过程中闪现的目标的空间位置。
DOI：
10.1152/jn.1990.64.2.575
复制
发表时间：
1990
影响因子：
2.5
通讯作者：
Dassonville,P
中科院分区：
文献类型：
--
作者：
Schlag,J;Schlag-Rey,M;Dassonville,P
1.如果一个偏心的，静止的目标是闪光，而一个主题是在黑暗中进行眼球运动，这个主题可以扫视的位置在空间中的目标短暂出现？不同的预测结果从替代假设的方式，其中眼跳目标的确定。视网膜误差被定义为从闪光时的眼睛位置到目标位置的向量，视网膜误差假设预测扫视向量将等于视网膜误差向量。这一假说假设眼动系统忽略了目标呈现和眼跳之间的眼球位移。如果是这样，目标就会落空。相比之下，空间误差假设预测大脑会考虑眼睛位移来计算目标的物理位置，因此可以针对该位置进行正确的眼跳。2.争论的焦点是眼睛瞄准的基本原则的普遍性。先前的研究已经确定，如果运动是扫视的，则眼睛位移被眼动系统用于计算目标的物理位置。在追求的情况下，对人类的感知实验表明，眼睛位移被考虑在内，虽然它的速度被低估。然而，在最近的一项研究中，McKenzie和Lisberger报告说，在追踪过程中开始的眼跳轨迹符合视网膜错误假设。换句话说，速度低估接近100%。3.虽然麦肯齐和利斯伯格的结果非常清楚，但它们可能依赖于特定的实验条件。这个问题被重新调查的情况下，促进歧视的刺激。（250字处删节）
1. If an eccentric, stationary target is flashed while a subject is performing an eye movement in the dark, can this subject make a saccade to the location in space where the target briefly appeared? Different predictions result from alternative hypotheses regarding the manner in which saccade goals are determined. Retinal error being defined as the vector from the eye position at the time of the flash to the position of the target, the retinal-error hypothesis predicts that the saccade vector will be equal to the retinal-error vector. This hypothesis assumes that the oculomotor system ignores the eye displacement between target presentation and saccade. If so, the target will be missed. In contrast, the spatial-error hypothesis predicts that the eye displacement is taken into account by the brain to calculate the target's physical location to which, therefore, a correct saccade could be aimed. 2. At issue is the generality of a fundamental principle of ocular targeting. Previous studies have established that, if the movement is saccadic, eye displacement is used by the oculomotor system to calculate the target's physical location. In the case of pursuit, perceptual experiments on humans suggest that eye displacement is taken into account although its velocity is underestimated. However, in a recent study McKenzie and Lisberger reported that saccade trajectories starting during pursuit conform to the retinal error hypothesis. In other words, velocity underestimation is close to 100%. 3. Although McKenzie and Lisberger's results are very clear, they might have depended on particular experimental conditions. The issue was reinvestigated in a situation facilitating the discrimination of stimuli.(ABSTRACT TRUNCATED AT 250 WORDS)