Keeping Track of Locations in Space
Keeping Track of Locations in Space
复制标题
跟踪太空中的位置
作者：
Ritchie K
视觉系统通过一个过程来补偿眼球运动的影响 称为重映射。之前，我们已经证明，当眼球运动大约 将刺激位置从盲人的视野转移到有视力的视野， 偏盲参与者，该位置的敏感性升高， 归因于从盲人到有视力的领域的重新映射（里奇，亨特，和 Sahraie，2012）。在这里，我们表明，一个病人的损害包括丘脑， 不能在他的盲视野中检测到刺激，并且没有显示出 重新映射我们设计了一项任务， 并显示正常观察者和那些患者 能够将信息从盲人领域重新映射到视力领域的人， 关于跨越扫视的空间位置的信息。但如果票数 患者没有重新标测的证据，在盲野中的表现是 与他的视野相比，他的视力受到了很大的损害。这些发现 这表明，重新映射有助于我们跟踪空间的能力， 在扫视中的位置。
The visual system compensates for the effect of eye movements through a process known as remapping. Previously, we have shown that when an eye movement is about to shift a stimulated location from the blind to the sighted visual field of hemianopic participants, sensitivity at that location is elevated, which we attribute to remapping from the blind to the sighted field (Ritchie, Hunt, and Sahraie, 2012). Here, we show that a patient whose damage includes the thalamus cannot detect a stimulus in his blind field and does not show evidence of remapping. We have devised a task which taps into the maintenance of spatial information across saccades and shows that normal observers and those patients who can remap information from their blind to sighted field can also maintain information regarding spatial locations across saccades. However, in the case of the patient without evidence for remapping, performance in the blind field is considerably impaired, compared with that of his sighted field. The findings suggest that remapping contributes to our ability to keep track of spatial locations across saccades.