Real-motion signals in human early visual cortex
Real-motion signals in human early visual cortex
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DOI：
10.1016/j.neuroimage.2018.04.012
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发表时间：
2018-07-15
期刊：
影响因子：
5.7
通讯作者：
Bartels, Andreas
中科院分区：
文献类型：
--
作者：
Nau, Matthias;Schindler, Andreas;Bartels, Andreas
眼球运动会引起视觉运动，这会使对世界的稳定感知变得复杂。视觉系统通过整合视觉输入与眼动命令的传出副本来补偿这种自诱导的视觉运动。这种机制是核心，因为它不仅支持感知稳定性，而且还介导了以世界为中心的客观运动的可靠感知。在人类中，它仍然是难以捉摸的视觉运动反应在早期retinotopic皮层是由客观的运动或视网膜运动与it.To解决这个问题，我们使用功能磁共振成像检查功能反应的16个视觉领域的组合，平面客观运动和追求眼球运动。观察者暴露于相对于追踪更快、匹配或更慢的客观运动，使我们能够比较在视网膜运动和眼球运动信号匹配时客观运动速度不同的条件。我们的研究结果表明，不仅更高级别的运动区域，如V3A和V6，但也早期的视觉区域信号的目标运动的速度，因此，产品的整合视网膜与非视网膜信号。这些结果为调节感知稳定性和真实运动感知的机制提供了新的线索，并表明与追踪眼球运动相关的视网膜外信号影响人类早期视觉皮层的处理。
Eye movements induce visual motion that can complicate the stable perception of the world. The visual system compensates for such self-induced visual motion by integrating visual input with efference copies of eye movement commands. This mechanism is central as it does not only support perceptual stability but also mediates reliable perception of world-centered objective motion. In humans, it remains elusive whether visual motion responses in early retinotopic cortex are driven by objective motion or by retinal motion associated with it. To address this question, we used fMRI to examine functional responses of sixteen visual areas to combinations of planar objective motion and pursuit eye movements. Observers were exposed to objective motion that was faster, matched or slower relative to pursuit, allowing us to compare conditions that differed in objective motion velocity while retinal motion and eye movement signals were matched. Our results show that not only higher level motion regions such as V3A and V6, but also early visual areas signaled the velocity of objective motion, hence the product of integrating retinal with non-retinal signals. These results shed new light on mechanisms that mediate perceptual stability and real-motion perception, and show that extra-retinal signals related to pursuit eye movements influence processing in human early visual cortex.