Displacement detection is suppressed by the post-saccadic stimulus

Displacement detection is suppressed by the post-saccadic stimulus
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位移检测受到眼跳后刺激的抑制

DOI:
10.1038/s41598-020-66216-1
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发表时间:
2020
期刊:
影响因子:
4.6
通讯作者:
ShioiriS.
ShioiriS.
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Takano;Matsumiya;Kuriki;Deubel;ShioiriS.

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为了建立感知稳定的世界,尽管由扫视眼球运动引起的大的视网膜移位,视觉系统降低其对扫视期间视觉刺激的位移的敏感性(例如,位移的扫视抑制,SSD)。先前的研究已经证明,在扫视之后插入时间空白可以提高位移检测性能。这种“空白效应”表明,在扫视后的视觉信息可能在SSD中发挥重要作用。要了解SSD的机制,我们在这里比较的影响,前和后扫视刺激对比度的位移检测在扫视和不插入空白。我们的研究结果表明,观察者检测视觉位移的敏感性降低,通过增加眼跳后刺激对比度,但空白缓解损害。我们成功地解释了一个模型的结果,提出细小的通路信号抑制负责检测跨越扫视位移的magno通路过程。我们的研究结果表明,抑制的magno通路的微小通路信号后立即扫视导致SSD,这有助于实现整个扫视视觉世界的感知稳定性。
To establish a perceptually stable world despite the large retinal shifts caused by saccadic eye movements, the visual system reduces its sensitivity to the displacement of visual stimuli during saccades (e.g. saccadic suppression of displacement, SSD). Previous studies have demonstrated that inserting a temporal blank right after a saccade improves displacement detection performance. This ‘blanking effect’ suggests that visual information right after the saccade may play an important role in SSD. To understand the mechanisms underlying SSD, we here compare the effect of pre- and post-saccadic stimulus contrast on displacement detection during a saccade with and without inserting a blank. Our results show that observers’ sensitivity to detect visual displacement was reduced by increasing post-saccadic stimulus contrast, but a blank relieves the impairment. We successfully explain the results with a model proposing that parvo-pathway signals suppress the magno-pathway processes responsible for detecting displacements across saccades. Our results suggest that the suppression of the magno-pathway by parvo-pathway signals immediately after a saccade causes SSD, which helps to achieve the perceptual stability of the visual world across saccades.
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