Allocation of attention across saccades
Allocation of attention across saccades
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DOI：
10.1152/jn.00656.2012
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发表时间：
2013-03-01
影响因子：
2.5
通讯作者：
Cavanagh, Patrick
中科院分区：
文献类型：
--
作者：
Jonikaitis, Donatas;Szinte, Martin;Cavanagh, Patrick
Jonikaitis D，Szinte M，罗尔夫M，Cavanagh P.扫视中注意力的分配。J Neurophysiol 109：1425-1434，2013.首次发表于2012年12月5日; doi：10.1152/jn.00656.2012.-当眼睛移动时，空间注意力必须跟踪目标在视网膜上移动的位置。本研究探讨了视觉注意对线索目标的跨扫视更新。当观察者准备扫视时，我们在他们的视觉周边闪现一个不相关但突出的颜色线索，并使用倾斜辨别任务测量扫视前后的空间注意力分配。我们发现，就在扫视之前，注意力被分配到线索的未来视网膜位置，其预测性的“重新映射”位置。尽管视网膜位置发生了变化，但在眼跳过程中，注意力仍然保持在线索在世界上的位置，而在眼睛着陆后，注意力在线索的视网膜位置迅速衰减。通过熄灭的颜色线索在扫视，我们进一步证明，视觉系统只依赖于预测分配的空间注意力，作为存在的线索后扫视并没有实质性地影响注意力分配。这些行为的结果支持和扩展的生理证据表明，预测激活的视觉神经元时，出席刺激将在他们的感受野后扫视。我们的研究结果表明，跨越扫视的空间位置的跟踪是一个合理的生理重新映射的结果。
Jonikaitis D, Szinte M, Rolfs M, Cavanagh P. Allocation of attention across saccades. J Neurophysiol 109: 1425-1434, 2013. First published December 5, 2012; doi:10.1152/jn.00656.2012.-Whenever the eyes move, spatial attention must keep track of the locations of targets as they shift on the retina. This study investigated transsaccadic updating of visual attention to cued targets. While observers prepared a saccade, we flashed an irrelevant, but salient, color cue in their visual periphery and measured the allocation of spatial attention before and after the saccade using a tilt discrimination task. We found that just before the saccade, attention was allocated to the cue's future retinal location, its predictively "remapped" location. Attention was sustained at the cue's location in the world across the saccade, despite the change of retinal position whereas it decayed quickly at the retinal location of the cue, after the eye landed. By extinguishing the color cue across the saccade, we further demonstrate that the visual system relies only on predictive allocation of spatial attention, as the presence of the cue after the saccade did not substantially affect attentional allocation. These behavioral results support and extend physiological evidence showing predictive activation of visual neurons when an attended stimulus will fall in their receptive field after a saccade. Our results show that tracking of spatial locations across saccades is a plausible consequence of physiological remapping.