Stereoscopic processing of crossed and uncrossed disparities in the human visual cortex.
Stereoscopic processing of crossed and uncrossed disparities in the human visual cortex.
复制标题
人类视觉皮层中交叉和非交叉差异的立体处理
DOI：
10.1186/s12868-017-0395-7
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发表时间：
2017-12-21
期刊：
影响因子：
2.4
通讯作者：
Long Z
中科院分区：
文献类型：
--
作者：
Li Y;Zhang C;Hou C;Yao L;Zhang J;Long Z
背景双目视差为立体环境中的深度感知提供了强有力的线索。尽管从神经影像学研究中对处理视差的皮层区域的了解越来越多，但对视差符号处理[交叉视差（CD）/非交叉视差（UD）]的神经机制仍然知之甚少。在本研究中，功能性磁共振成像（fMRI）被用来探索不同的神经功能，是相关的magnitity-sign processing.MethodsWe进行了一个功能性磁共振成像实验27右利手健康人类志愿者通过使用一般线性模型（GLM）和多体素模式分析（MVPA）的方法。首先，使用GLM来确定对不同视差符号显示不同反应的皮层区域。其次，MVPA被用来确定如何区分不同的差距signs.ResultsThe GLM分析结果表明，形状与UD诱导的子区域（LO）的外侧枕叶皮层（ESTA）比那些与CD显着更强的活动。基于感兴趣区的MVPA结果表明，V3 d和V3 A区在区分交叉和非交叉视差方面的准确性高于V3 D区。基于探照灯的MVPA的结果表明，背侧视皮层表现出显着更高的预测准确性比腹侧视皮层和子区域LO的交叉和非交叉disparity.ConclusionsThe结果可能表明，背侧视觉区是更歧视的视差符号比腹侧视觉区，虽然他们是不敏感的视差符号处理的准确性。此外，腹侧视皮层的LO与不同视差符号形状的识别有关，并对视差符号具有区分性。
BackgroundBinocular disparity provides a powerful cue for depth perception in a stereoscopic environment. Despite increasing knowledge of the cortical areas that process disparity from neuroimaging studies, the neural mechanism underlying disparity sign processing [crossed disparity (CD)/uncrossed disparity (UD)] is still poorly understood. In the present study, functional magnetic resonance imaging (fMRI) was used to explore different neural features that are relevant to disparity-sign processing.MethodsWe performed an fMRI experiment on 27 right-handed healthy human volunteers by using both general linear model (GLM) and multi-voxel pattern analysis (MVPA) methods. First, GLM was used to determine the cortical areas that displayed different responses to different disparity signs. Second, MVPA was used to determine how the cortical areas discriminate different disparity signs.ResultsThe GLM analysis results indicated that shapes with UD induced significantly stronger activity in the sub-region (LO) of the lateral occipital cortex (LOC) than those with CD. The results of MVPA based on region of interest indicated that areas V3d and V3A displayed higher accuracy in the discrimination of crossed and uncrossed disparities than LOC. The results of searchlight-based MVPA indicated that the dorsal visual cortex showed significantly higher prediction accuracy than the ventral visual cortex and the sub-region LO of LOC showed high accuracy in the discrimination of crossed and uncrossed disparities.ConclusionsThe results may suggest the dorsal visual areas are more discriminative to the disparity signs than the ventral visual areas although they are not sensitive to the disparity sign processing. Moreover, the LO in the ventral visual cortex is relevant to the recognition of shapes with different disparity signs and discriminative to the disparity sign.
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影响因子：
3.1
作者：
Kujovic, Milenko;Zilles, Karl;Malikovic, Aleksandar;Schleicher, Axel;Mohlberg, Hartmut;Rottschy, Claudia;Eickhoff, Simon B.;Amunts, Katrin
通讯作者：
Amunts, Katrin
影响因子：
25
作者：
Murray, SO;Boyaci, H;Kersten, D
通讯作者：
Kersten, D
影响因子：
2.5
作者：
Minini, Loredana;Parker, Andrew J.;Bridge, Holly
通讯作者：
Bridge, Holly
影响因子：
5.3
作者：
Kourtzi, Z;Kanwisher, N
通讯作者：
Kanwisher, N
影响因子：
56.9
作者：
Janssen, P;Vogels, R;Orban, CA
通讯作者：
Orban, CA