The space for memory in posterior parietal cortex: Re-analyses of bottom-up attention data
The space for memory in posterior parietal cortex: Re-analyses of bottom-up attention data
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DOI：
10.1016/j.neuropsychologia.2020.107551
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发表时间：
2020-09-01
期刊：
影响因子：
2.6
通讯作者：
Moscovitch, Morris
中科院分区：
文献类型：
--
作者：
Ciaramelli, Elisa;Moscovitch, Morris
腹侧区（VPC）和背侧区的后顶叶皮层是长期以来已知的调解自下而上和自上而下的注意到外部空间。因为这些区域也与情景记忆的提取有关，我们认为它们也介导了对内部（记忆）空间的注意。对这种注意力对记忆的假设的一个反对意见是，涉及将注意力引导到感知和记忆的顶叶区域在空间上相邻但不重叠，这表明每个区域涉及不同的神经机制。这种错位在VPC中最为明显。在这里，我们重新检查fMRI数据，并表明（1）不同的VPC子区域与自下而上的外部空间注意力的不同方面相关，（2）只有VPC子区域显示无效线索（但不是古怪）效应与情景记忆提取相关的区域重叠，导致我们得出结论：（3）信号意外感知的相同区域也信号意外记忆。这些研究结果是一致的“总体观点”的VPC部署自下而上的注意力在感知和情景记忆检索，并建议在这两个领域的解剖收敛的程度取决于特定的自下而上的注意力需求的感知和记忆任务之间的对应关系。
The ventral (VPC) and dorsal sectors of the posterior parietal cortex are long known to mediate bottom-up and top-down attention to the external space. Because these regions also are implicated in retrieval of episodic memories, we proposed they also mediate attention to the internal (memory) space. One objection to this Attention to Memory hypothesis is that parietal regions involved in directing attention to percepts and memory are spatially adjacent but not overlapping, suggesting that different neural mechanisms are involved in each. This misalignment is most pronounced in VPC. Here, we re-examine fMRI data, and show that (1) different VPC subregions are associated with different aspects of bottom-up attention to the external space, (2) only VPC subregions showing invalid cue (but not oddball) effects overlap with those associated with episodic memory retrieval, leading us to conclude that (3) the same regions that signal unexpected percepts also signal unexpected memories. These findings are consistent with the 'overarching view' of VPC as deploying bottom-up attention during both perception and episodic memory retrieval, and suggest that the degree of anatomical convergence across the two domains depends on the correspondence between the specific bottom-up attention demands of perceptual and memory tasks.