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Stimulating the Lip Motor Cortex with Transcranial Magnetic Stimulation
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言語のための感覚運動変容は,双方向的に起こります.
Gregory B Cogan1, Thomas Thesen2, Chad Carlson3
1Center for Neural Science, New York University, New York, New York 10003, USA.
Nature
|January 17, 2014
まとめ
聴覚的知覚と運動生産を結びつけるのに不可欠な言語感覚運動系は,左側のみに偏っているわけではありません. 直接の神経記録は,これらの感覚運動変容が脳で双方向に発生することを明らかにします.
科学分野:
- 神経科学は神経科学である.
- スピーチプロセッシング 音声処理
- 聴覚的知覚と運動生産
背景:
- 歴史的に,スピーチ処理モデルは,聴覚知覚と運動出力をリンクするための左側側感官運動システムを強調しました.
- このシステムは,構文や意味学のような高階言語機能に不可欠であると考えられていた.
- 音声知覚は双方向であることが知られているが,感覚運動変換の神経基礎は論争の的だった.
研究 の 目的:
- 言語処理における感覚運動変換の基礎となる神経機構を調査する.
- 言語感覚運動系が左側または双方向であるかどうかを判断する.
主な方法:
- 直接的なニューラル録音は,公然としたスピーチ生産のタスクを実行する被験者に使用されました.
- 神経応答は,言葉の繰り返しと非言葉の変換タスクにおける知覚と生産の両方で分析されました.
- 双方の下部前頭皮質,頭皮質,頭皮質,前運動皮質,体感覚皮質からの電極データを調べました.
主要な成果:
- 強固な感覚運動神経応答は,スピーチの知覚と発声の間に,二国間的に複数の皮質領域にわたって観察されました.
- 双方の感覚運動反応は,スピーチ知覚に基づく表現をスピーチ生産に基づく表現に変換する能力を示しました.
- これらの発見は,厳格に左側化された言語感覚運動システムに関する伝統的な見解に異議を唱える.
結論:
- この研究は,双方向のサブレキシカルスピーチ感覚運動系を確立しています.
- この二国間のシステムは,聴覚的なスピーチの入力を,運動スピーチの出力に変換する上で重要な役割を果たします.
- これらの発見は,スピーチ処理と言語のニューラル基盤を理解する上で重要な意味を持つ.
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