Tanaka Kyohei, Ohta Shinri, Kinno Ryuta, Sakai Kuniyoshi L
Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo.
Division of Neurology, Department of Internal Medicine, Showa University School of Medicine.
Proc Jpn Acad Ser B Phys Biol Sci. 2017;93(7):511-522. doi: 10.2183/pjab.93.031.
Our previous functional magnetic resonance imaging (fMRI) studies have indicated that the left dorsal inferior frontal gyrus (L. dF3op/F3t) and left lateral premotor cortex (L. LPMC) are crucial regions for syntactic processing among the syntax-related networks. In the present study, we further examined how activations in these regions were modified by the factors of construction and scrambling (object-initial type). Using various sentence types, we clarified three major points. First, we found that the main effects of construction and scrambling consistently activated the L. dF3op/F3t and L. LPMC. Secondly, the main effects of scrambling clearly localized activation in the L. dF3op/F3t and L. LPMC, indicating the more narrowed down processing of syntax. Thirdly, step-wise percent signal changes were observed in the L. dF3op/F3t, demonstrating synergistic effects of construction and scrambling. These results demonstrate the abstract and intensive nature of syntactic processing carried out by these regions, i.e., the grammar center.
我们之前的功能磁共振成像（fMRI）研究表明，左侧背侧额下回（L. dF3op/F3t）和左侧外侧运动前区皮层（L. LPMC）是句法相关网络中句法处理的关键区域。在本研究中，我们进一步考察了这些区域的激活是如何受到结构和词序颠倒（宾语前置类型）因素影响的。我们使用了各种句子类型，阐明了三个要点。第一，我们发现结构和词序颠倒的主效应均能持续激活L. dF3op/F3t和L. LPMC。第二，词序颠倒的主效应使L. dF3op/F3t和L. LPMC的激活明显定位，表明句法处理更为细化。第三，在L. dF3op/F3t中观察到信号变化百分比呈逐步变化，表明结构和词序颠倒存在协同效应。这些结果证明了这些区域（即语法中心）所进行的句法处理具有抽象性和集约性。
