Trans-saccadic interactions in human parietal and occipital cortex during the retention and comparison of object orientation
Trans-saccadic interactions in human parietal and occipital cortex during the retention and comparison of object orientation
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DOI：
10.1016/j.cortex.2016.06.012
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发表时间：
2016-09-01
期刊：
影响因子：
3.6
通讯作者：
Crawford, J. Douglas
中科院分区：
文献类型：
--
作者：
Dunkley, Benjamin T.;Baltaretu, Bianca;Crawford, J. Douglas
视觉对象特征的跨扫视存储和整合的皮质部位是未知的。在这里，我们使用了一种fMRI适应的变体，其中受试者注视于简要呈现的视觉光栅的左侧或右侧，保持注视或扫视到相对侧，然后判断重新呈现的光栅是否具有相同或不同的方向。fMRI分析显示，在右侧缘上回的视野不敏感簇中，跨扫视相互作用（不同>相同方向）。该群集位于顶叶视野的前外侧极（在定位器任务中识别）。我们还观察到凝视为中心的，领域特定的相互作用（相同>不同的方向）在一个外纹簇重叠与假定的“V4”。基于这些数据和我们的文献回顾，我们得出结论，这些边缘上和纹外区参与的保留，空间更新，并评价对象的方向信息跨越扫视。(C)2016爱思唯尔有限公司版权所有
The cortical sites for the trans-saccadic storage and integration of visual object features are unknown. Here, we used a variant of fMRI-Adaptation where subjects fixated to the left or right of a briefly presented visual grating, maintained fixation or saccaded to the opposite side, then judged whether a re-presented grating had the same or different orientation. fMRI analysis revealed trans-saccadic interactions (different > same orientation) in a visual field-insensitive cluster within right supramarginal gyrus. This cluster was located at the anterolateral pole of the parietal eye field (identified in a localizer task). We also observed gaze centered, field-specific interactions (same > different orientation) in an extrastriate cluster overlapping with putative 'V4'. Based on these data and our literature review, we conclude that these supramarginal and extrastriate areas are involved in the retention, spatial updating, and evaluation of object orientation information across saccades. (C) 2016 Elsevier Ltd. All rights reserved.