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Hokkaido University Collection of Scholarly and Academic Papers >
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隠喩理解過程の神経基盤 : fMRIによる検討
| Title: | 隠喩理解過程の神経基盤 : fMRIによる検討 |
| Other Titles: | Neural bases associated with metaphor comprehension : An fMRI study |
| Authors: | 柴田, みどり Browse this author | | 阿部, 純一 Browse this author | | 寺尾, 敦 Browse this author | | 宮本, 環 Browse this author |
| Keywords: | metaphor | | literal sentence | | figurative statement | | inferior frontal gyrus | | right hemisphere | | functional MRI | | 隠喩 | | 字義文 | | 修辞表現 | | 下前頭回 | | 右半球 | | 機能的磁気共鳴画像法 |
| Issue Date: | Sep-2007 |
| Publisher: | 日本認知科学会 |
| Journal Title: | 認知科学 |
| Volume: | 14 |
| Issue: | 3 |
| Start Page: | 339 |
| End Page: | 354 |
| Abstract: | In this study, we investigated the neural substrate involved in the comprehension of novel metaphoric sentences using event-related functional magnetic resonance imaging (fMRI). Stimuli were simple and short Japanese copula sentences of the form "An A is a B" without any contextual information. Participants read these sentences silently and responded as to whether or not they could understand the sentence as a metaphor. The metaphoric sentences in contrast to literal sentences elicited the higher activation in the right inferior frontal gyrus (BA 47), the medial frontal gyrus (BA 10), the left inferior frontal gyrus (BA 45), the left precentral, and the left superior temporal gyrus (BA 38). The opposite contrast (literal sentences in contrast to metaphoric sentences) gave higher activation in the left middle frontal gyrus (BA 6), the left fusiform, the insula, the precuneus, the right superior frontal gyrus (BA 6), and the right precentral (BA 4/6). The higher activation in the right inferior frontal gyrus (BA 47) in metaphoric sentences in contrast to literal sentences revealed the involvement in the right hemisphere in metaphor comprehension. These results suggest that figurative statements strongly require cognitive processing for searching semantic relationships compared to literal statements and the right hemisphere is involved in this processing. | | 本研究は，隠喩文，字義文，アノマラス文を対象とし，隠喩文の理解に関与する神経基盤についてfMRIを用いて比較検討した．“AはBだ”の形式の名詞述語文を用い，文が「比喩として理解できるか」どうかについて判断を求めた．字義文条件に対する，隠喩文条件における差分比較を行ったところ，右の下前頭回，内側前頭回，左の下前頭回，左の中心前回から上側頭回などで字義文条件に比べて有意に高い賦活が示された．隠喩文条件に対する字義文条件での差分比較では，左の中前頭回，紡錘状回，島，楔前部，および右の上前頭回から中心前回などで有意に高い賦活が見られた．特に，隠喩文条件において，右の下前頭回(BA47)で高い賦活が見られたことは，隠喩的な理解が字義的な理解とは異なり，一部右半球の関与によって支えられている可能性があることを示唆していると言える． |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/28747 |
| Appears in Collections: | 文学院・文学研究院 (Graduate School of Humanities and Human Sciences / Faculty of Humanities and Human Sciences) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 柴田 みどり
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