言語生産の体感覚的基礎である言語生産は,
Stéphanie Tremblay1, Douglas M Shiller, David J Ostry
1Department of Psychology, McGill University, Montreal, Quebec H3A 1B1, Canada.
Nature
|June 20, 2003
まとめ
音声の生産は,聴覚信号だけでなく,体感覚フィードバックに依存しています. この研究は,音声発音器の動きは,発生する音声とは関係なく,体感覚情報によって制御されていることを示しています.
科学分野:
- スピーチ・プロダクション・リサーチ・スピーチ・プロデュース・リサーチ
- モーター コントロール
- 聴覚神経科学は,聴覚に関する神経科学です.
背景:
- 主要な仮説は,スピーチの目標が音響的に定義され,聴覚的フィードバックによって維持されると主張する.
- 別の説では,言語の生成は,運動制御信号と体感覚フィードバックに依存している.
- 言語における体感覚的役割に関する以前の研究は,同時に発生する音響の変化のために,結論を導きませんでした.
研究 の 目的:
- 言語生産における体感覚フィードバックの独立した役割を調査する.
- 音声タスク中に聴覚と体感覚のフィードバックを分離する.
- 言語の動きを達成するために,体感覚情報が不可欠であるかどうかを判断する.
主な方法:
- 機械的な負荷がの動きを変え,体感覚フィードバックに影響を与える一方で,被験者は言葉を発した.
- 音響出力は,測定可能または感知可能な変化をモニターした.
- 機械的負荷への適応は時間とともに評価されました.
主要な成果:
- 被験者は機械的な負荷にうまく適応し,の動きを修正しました.
- 機械的負荷は,音響出力の測定可能なまたは感知可能な変化を生じませんでした.
- これは,スピーチ中の体感覚と聴覚フィードバックの間の分離を示しています.
結論:
- ソマトセンサリー情報は,正確なスピーチの動きを達成するために不可欠です.
- 言語生産の目標には,体感覚の入力によってシグナルされる特定の発音器の位置が含まれます.
- この体感覚的目標は,音声的目標であるスピーチ生産とは分離しています.
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