Functional difference between the ventral visual cortex and the intraparietal sulcus in visual working memory of material properties
Functional difference between the ventral visual cortex and the intraparietal sulcus in visual working memory of material properties
复制标题
腹侧视觉皮层和顶内沟在材料特性视觉工作记忆中的功能差异
DOI：
10.1097/wnr.0000000000001515
复制
发表时间：
2020
期刊：
影响因子：
1.7
通讯作者：
Saiki Jun
中科院分区：
文献类型：
--
作者：
Fujimichi Munendo;Yamamoto Hiroki;Saiki Jun
最近的一项研究表明，物体的粗糙度（光滑或粗糙）被保存在腹侧视觉皮层和顶叶内沟（IPS）的视觉工作记忆（VWM）中。在这里，我们研究了这些区域在材料特性的VWM背景下的功能差异。我们专注于参与者准确提取并在记忆中保持球体光泽度和粗糙度的过程。人类参与者执行两种类型的延迟材料（光泽度或粗糙度）判别任务，他们根据两个顺序呈现的样品球体的材料特性差异来判断执行哪项任务。这项任务使我们能够研究人类大脑中的视觉系统如何正确地提取材料属性并将信息保存在VWM中。通过解码延迟期大脑活动模式中的任务信息（光泽度或粗糙度），我们发现腹侧视觉皮层和IPS都对材料特性的记忆维持有贡献。在每次试验过程中，我们还在这些区域展示了不同的解码模式；腹侧视觉皮层在提取材料属性方面的表现高于随机表现，而IPS在保持记忆属性方面的表现高于随机表现。这些结果表明，在VWM中，材料特性在腹侧视觉皮层进行视觉处理，并将视觉信息发送到IPS进行稳健维护。
A recent study showed that objects’ roughness (smooth or rough) was held in visual working memory (VWM) in the ventral visual cortex and the intraparietal sulcus (IPS). Here, we investigated the functional differences between these areas in the context of VWM of material properties. We focused on the process in which participants accurately extracted and maintained in their memories the glossiness and roughness of a sphere. Human participants performed two types of delayed material (glossiness or roughness) discrimination tasks in which they judged which task was to be performed based on the differences in the material properties of two sequentially presented sample spheres. This task allowed us to investigate how the visual system in the human brain could properly extract a material property and hold the information in VWM. By decoding the task information (glossiness or roughness) from the brain activity patterns in the delay period, we found that both the ventral visual cortex and the IPS contributed to maintenance in memory of material properties. We also showed different decoding patterns in the areas over the course of each trial; the ventral visual cortex performed at levels above chance performance in extracting a material property, and the IPS performed at levels above chance performance in maintaining the property in memory. These results suggest that, in VWM, material properties are visually processed in the ventral visual cortex, and the visual information is sent to the IPS to be robustly maintained.