Parietal-driven visual working memory representation in occipito-temporal cortex.
Parietal-driven visual working memory representation in occipito-temporal cortex.
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枕颞皮层顶叶驱动的视觉工作记忆表示。
DOI：
10.1016/j.cub.2023.08.080
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Xu,Yaoda
中科院分区：
文献类型：
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作者：
Xu,Yaoda
人类功能磁共振成像（fMRI）研究已经广泛证明，视觉工作记忆（VWM）的内容可以通过枕颞皮质（OTC）（包括早期视觉区（EVC））和后顶叶皮质（PPC）在延迟期的fMRI体素反应模式可靠地解码。1,2,3,4进一步的研究表明，VWM信号在很大程度上是由前额叶皮质（PFC）和前额叶皮质（ppc）等联想区域的反馈维持的。4,5,6,7,8,9然而，VWM期间的反馈是简单地恢复了最初在VWM中形成的感觉表征，还是在VWM延迟期间重塑了OTC的表征内容尚不清楚。利用最近的一项研究结果，我们发现，在VWM延迟期间，OTC的物体表征几何在感知过程中与PPC的物体表征几何在感知过程中变得更加一致，而不是与其本身一致。这一发现支持了反馈在形成OTC中VWM内容中的作用，OTC的VWM内容更多地由PPC中保留的信息决定，而不是由OTC中最初编码的感觉信息决定。
Human fMRI studies have documented extensively that the content of visual working memory (VWM) can be reliably decoded from fMRI voxel response patterns during the delay period in both the occipito-temporal cortex (OTC), including early visual areas (EVC), and the posterior parietal cortex (PPC).1,2,3,4Further work has revealed that VWM signal in OTC is largely sustained by feedback from associative areas such as prefrontal cortex (PFC) and PPC.4,5,6,7,8,9It is unclear, however, if feedback during VWM simply restores sensory representations initially formed in OTC or if it can reshape the representational content of OTC during VWM delay. Taking advantage of a recent finding showing that object representational geometry differs between OTC and PPC in perception,10here we find that, during VWM delay, the object representational geometry in OTC becomes more aligned with that of PPC during perception than with itself during perception. This finding supports the role of feedback in shaping the content of VWM in OTC, with the VWM content of OTC more determined by information retained in PPC than by the sensory information initially encoded in OTC.