Probing the Cognitive Mechanism of Mental Representational Change During Chunk Decomposition: A Parametric fMRI Study
Probing the Cognitive Mechanism of Mental Representational Change During Chunk Decomposition: A Parametric fMRI Study
复制标题
探究块分解过程中心理表征变化的认知机制：参数化功能磁共振成像研究
DOI：
10.1093/cercor/bhv113
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发表时间：
2016-07-01
期刊：
影响因子：
3.7
通讯作者：
Luo, Jing
中科院分区：
文献类型：
--
作者：
Tang, Xiaochen;Pang, Jiaoyan;Luo, Jing
组块分解在认知灵活性中起着重要的作用，特别是关于表征变化，这对洞察力问题解决和创造性思维至关重要。本研究采用功能磁共振成像的参数化设计，探讨了汉字组块分解的认知机制。我们的结果从这个参数操作显示广泛分布的激活在额叶，顶叶和枕叶皮层和负激活顶叶和视觉区在分解过程中块紧。为了在精神上操纵给定旧块的元素，上级顶叶似乎支持以目标导向的方式进行元素重组，而负激活的下级顶叶可能支持防止不相关的对象被关注。此外，确定可供选择的重组方式需要认知控制网络中的一系列额叶区域，例如抑制主要组块表征的右侧前额叶皮层，启动心理任务集转换的前辅助运动区，以及建立任务集的下额叶连接。总之，这表明，组块分解反映了问题表征的心理转变，从一个不适当的状态，以一个新的一起评价的新的和有见地的解决方案的尾状核在背侧纹状体。
Chunk decomposition plays an important role in cognitive flexibility in particular with regards to representational change, which is critical for insight problem solving and creative thinking. In this study, we investigated the cognitive mechanism of decomposing Chinese character chunks through a parametric fMRI design. Our results from this parametric manipulation revealed widely distributed activations in frontal, parietal, and occipital cortex and negative activations in parietal and visual areas in response to chunk tightness during decomposition. To mentally manipulate the element of a given old chunk, superior parietal lobe appears to support element restructuring in a goal-directed way, whereas the negatively activated inferior parietal lobe may support preventing irrelevant objects from being attended. Moreover, determining alternative ways of restructuring requires a constellation of frontal areas in the cognitive control network, such as the right lateral prefrontal cortex in inhibiting the predominant chunk representations, the presupplementary motor area in initiating a transition of mental task set, and the inferior frontal junction in establishing task sets. In conclusion, this suggests that chunk decomposition reflects mental transformation of problem representation from an inappropriate state to a new one alongside with an evaluation of novel and insightful solutions by the caudate in the dorsal striatum.