Department of Experimental Psychology, University of Magdeburg, Germany.
Neuroimage. 2013 Feb 15;67:363-74. doi: 10.1016/j.neuroimage.2012.11.025. Epub 2012 Nov 28.
Behavioral evidence suggests that the use of implicitly learned spatial contexts for improved visual search may depend on visual working memory resources. Working memory may be involved in contextual cueing in different ways: (1) for keeping implicitly learned working memory contents available during search or (2) for the capture of attention by contexts retrieved from memory. We mapped brain areas that were modulated by working memory capacity. Within these areas, activation was modulated by contextual cueing along the descending segment of the intraparietal sulcus, an area that has previously been related to maintenance of explicit memories. Increased activation for learned displays, but not modulated by the size of contextual cueing, was observed in the temporo-parietal junction area, previously associated with the capture of attention by explicitly retrieved memory items, and in the ventral visual cortex. This pattern of activation extends previous research on dorsal versus ventral stream functions in memory guidance of attention to the realm of attentional guidance by implicit memory.
行为证据表明，使用隐含学习的空间上下文来提高视觉搜索的效率可能依赖于视觉工作记忆资源。工作记忆可能以不同的方式参与到上下文引导中：（1）在搜索过程中保持隐含学习的工作记忆内容的可用性，或者（2）通过从记忆中检索到的上下文来捕获注意力。我们绘制了受工作记忆容量调节的大脑区域图。在这些区域中，激活沿着顶内沟的下降段被上下文引导所调节，这个区域之前与明确记忆的维持有关。在先前与通过明确检索的记忆项目捕获注意力有关的颞顶交界处区域和腹侧视觉皮层中，观察到了对学习显示的激活增加，但不受上下文引导大小的调节。这种激活模式将记忆引导注意力的背侧与腹侧流功能的先前研究扩展到了由隐含记忆引导注意力的领域。
