Neural basis for dynamic updating of object representation in visual working memory
Neural basis for dynamic updating of object representation in visual working memory
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DOI：
10.1016/j.neuroimage.2009.11.029
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发表时间：
2010-02
期刊：
影响因子：
5.7
通讯作者：
S. Takahama;S. Miyauchi;J. Saiki
中科院分区：
文献类型：
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作者：
S. Takahama;S. Miyauchi;J. Saiki
在真实的世界中，物体具有多种特征，并且是动态变化的。因此，对象表示必须满足动态更新和特征绑定。以前的研究已经调查了神经活动的动态更新或功能绑定单独，但不是同时。我们研究了神经基础的特征约束对象表示在动态更新的情况下进行多对象持久性跟踪任务，这需要观察员同时处理的维护和动态更新的特征约束对象。使用事件相关的设计，我们分离的内存维护和变化检测期间的活动。在搜索区域显示选择性激活的动态更新功能绑定的对象，我们确定了一个网络，在记忆维护，是由下中央前沟，上级顶叶小叶，额中回。在变化检测期间，包括前额叶皮层在内的各种前额叶区域被激活。在动态运动物体的更新表征中，下中央前沟与所谓的“额顶网络”密切合作，额顶网络的子区域可以分解为对空间更新和特征绑定敏感的子区域。前额叶皮层通过比较记忆和知觉表征来识别物体表征的变化，而不是像前面所说的那样保持物体表征本身。
In real world, objects have multiple features and change dynamically. Thus, object representations must satisfy dynamic updating and feature binding. Previous studies have investigated the neural activity of dynamic updating or feature binding alone, but not both simultaneously. We investigated the neural basis of feature-bound object representation in a dynamically updating situation by conducting a multiple object permanence tracking task, which required observers to simultaneously process both the maintenance and dynamic updating of feature-bound objects. Using an event-related design, we separated activities during memory maintenance and change detection. In the search for regions showing selective activation in dynamic updating of feature-bound objects, we identified a network during memory maintenance that was comprised of the inferior precentral sulcus, superior parietal lobule, and middle frontal gyrus. In the change detection period, various prefrontal regions, including the anterior prefrontal cortex, were activated. In updating object representation of dynamically moving objects, the inferior precentral sulcus closely cooperates with a so-called “frontoparietal network”, and subregions of the frontoparietal network can be decomposed into those sensitive to spatial updating and feature binding. The anterior prefrontal cortex identifies changes in object representation by comparing memory and perceptual representations rather than maintaining object representations per se, as previously suggested.