Motion parallax links visual motion areas and scene regions

Motion parallax links visual motion areas and scene regions
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运动视差链接视觉运动区域和场景区域

DOI:
10.1016/j.neuroimage.2015.10.066
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发表时间:
2016
期刊:
影响因子:
5.7
通讯作者:
Bartels A
Bartels A
中科院分区:
医学1区
文献类型:
--
作者:
Schindler A;Bartels A

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当我们移动时,我们周围物体的视网膜速度根据它们的相对距离而不同,并产生一个强大的三维视觉线索,称为运动视差。运动视差使我们能够推断我们周围的3D结构以及基于2D视网膜信息的自我运动。然而,在视觉运动和场景处理之间的神经基质介导的联系在很大程度上是未开发的。我们使用功能磁共振成像在人类观察者研究运动视差的生态相关的,但高度控制的刺激,模仿观察者的横向运动过去的深度分层的场景。我们发现视差选择性反应在顶叶IPS3和IPS4,并在一个区域的横向场景选择枕区(OPA)。传统定义的场景反应区OPA、海马旁位置区(PPA)和压后皮质(RSC)对视差无反应。在视差处理过程中,枕部视差选择性区域与IPS3和场景选择性PPA具有高度特异性的功能连接。这些结果建立了一个网络连接背侧运动和腹侧场景处理区域,特别是在视差处理,这可能是大脑的能力,从运动视差获得3D场景信息。
When we move, the retinal velocities of objects in our surrounding differ according to their relative distances and give rise to a powerful three-dimensional visual cue referred to as motion parallax. Motion parallax allows us to infer our surrounding's 3D structure as well as self-motion based on 2D retinal information. However, the neural substrates mediating the link between visual motion and scene processing are largely unexplored. We used fMRI in human observers to study motion parallax by means of an ecologically relevant yet highly controlled stimulus that mimicked the observer's lateral motion past a depth-layered scene. We found parallax selective responses in parietal regions IPS3 and IPS4, and in a region lateral to scene selective occipital place area (OPA). The traditionally defined scene responsive regions OPA, the para-hippocampal place area (PPA) and the retrosplenial cortex (RSC) did not respond to parallax. During parallax processing, the occipital parallax selective region entertained highly specific functional connectivity with IPS3 and with scene selective PPA. These results establish a network linking dorsal motion and ventral scene processing regions specifically during parallax processing, which may underlie the brain's ability to derive 3D scene information from motion parallax.
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发表时间: 2012-04
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影响因子: --
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