Maintaining coherence of dynamic objects requires coordination of neural systems extended from anterior frontal to posterior parietal brain cortices
Maintaining coherence of dynamic objects requires coordination of neural systems extended from anterior frontal to posterior parietal brain cortices
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DOI：
10.1016/j.neuroimage.2005.01.045
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发表时间：
2005-05-15
期刊：
影响因子：
5.7
通讯作者：
Miyauchi, S
中科院分区：
文献类型：
--
作者：
Imaruoka, T;Saiki, J;Miyauchi, S
视觉工作记忆中的对象表征使人类能够感知一致的视觉世界，并且必须满足两个属性：一致性和动态更新。本研究使用功能性磁共振成像（fMRI）测量大脑活动在多物体永久性跟踪（MOPT）任务，这需要观察者同时处理的连贯性维护和动态更新的对象。全脑分析显示，在物体移动和物体静止的条件下，额叶前部和腹侧部分和背侧额顶叶激活。随后在前/腹侧额叶和背侧额顶叶区域的感兴趣的区域分析显示，这两个系统从事两个不同的认知过程中参与的MOPT任务，与连贯性维护处理在前/腹侧额叶区域和空间处理在背侧额顶叶网络。这些结果表明，这两个系统之间的合作巩固了视觉工作记忆中的对象表征。(c)2005年爱思唯尔公司All rights reserved.
Object representation in visual working memory enables humans to perceive a consistent visual world and must satisfy two attributes: coherence and dynamic updating. The present study measured brain activity using functional magnetic resonance imaging (fMRI) during the multiple object permanence tracking (MOPT) task, which requires observers to process simultaneously both coherence maintenance and dynamic updating of objects. Whole brain analysis revealed anterior and ventral parts of frontal area and dorsal frontoparietal activation during both object-moving and object-stationary conditions. Subsequent region-of-interest analyses in the anterior/ventral frontal and the dorsal frontoparietal regions revealed that these two systems engage the two different cognitive processes involved in the MOPT task, with coherency maintenance processed in the anterior/ventral frontal areas and spatial processing in the dorsal frontoparietal network. These results suggest that cooperation between these two systems underpins object representations in visual working memory. (c) 2005 Elsevier Inc. All rights reserved.