講演抄録/キーワード |
講演名 |
2005-06-17 16:40
転位の起こる文を読解する時のMEGによる脳活動の解析 ○渡邊直輝・竹内文也・栗城眞也(北大)・萩原裕子(都立大) |
抄録 |
(和) |
本研究では,語順の変わる日本語複文における主節と従属節を構成する句(主語,目的語,述語)を視覚的に順次呈示し,句ごとに脳磁界応答(MEG)の計測を行った.さらに,得られた計測結果から電流分布解析(L1ノルム法)を用いて,脳活動の大きな潜時で複数信号源推定を行った.その結果,視覚野の活動が小さくなった後の,句呈示後の潜時300ms以降において,前頭前部,前頭部,側頭部,頭頂部,後頭部の広い範囲で主要な活動が観測された.転位の起こる文を読解した時には,特に左脳半球の運動野で大きな活動が見られ,運動野の活動の関与が示唆された. |
(英) |
We have measured MEG response while subjects were reading Japanese complex sentences, which were presented visually phrase-by-phrase. The sentences consisted of subject-, object-, and verb-phrases, constituting the main clause and subordinate clause. MEG responses were recorded for each phrase, and the reconstruction of distributed current sources that were constrained on the cortex surface was performed using a current density analysis (Minimum L1 Norm reconstruction). In the result, after the activities of visual area were reduced, main activities occurred in wide areas of the prefrontal, frontal, temporal, parietal and occipital regions. When subjects read a sentence with displacement, the obtained results indicated a strong activation especially in the motor region of the left hemisphere, which suggests the involvement of the motor activity in processing the displaced sentence without overt speech. |
キーワード |
(和) |
言語 / 転位 / 脳磁界 / MEG / L1ノルム法 / / / |
(英) |
Language / Displacement / Brain magnetic field / MEG / L1 Norm reconstruction / / / |
文献情報 |
信学技報, vol. 105, no. 122, MBE2005-19, pp. 33-36, 2005年6月. |
資料番号 |
MBE2005-19 |
発行日 |
2005-06-10 (MBE) |
ISSN |
Print edition: ISSN 0913-5685 |
PDFダウンロード |
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