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視覚運動の変容装置としての身体イメージは,逆視の適応で明らかになりました

K Sekiyama¹, S Miyauchi, T Imaruoka

¹Division of Cognitive Psychology, Future University-Hakodate, Kameda Nakano, Japan. sekiyama@fun.ac.jp

|October 3, 2000

まとめ

視覚野の逆転に適応する人は,脳の中で新しい手表現を発展させることで,視覚野の逆転に適応する. これは,視覚運動の行動と空間認識の改善を可能にし,脳の可塑性を示します.

科学分野:

神経科学は神経科学である.
コグニティブ・サイエンスコグニティブ・サイエンス
人間の生理学人間生理学

背景:

プリズマ誘発の視野の逆転に対する人間の適応は,行動と知覚を回復します.
適応の正確なメカニズム,特に身体表現の役割は不明である.

研究の目的:

逆視への適応時の手に関する新しい視覚運動マッピング表現の出現を調査する.
この適応プロセスに関連する神経関連性を探求する.

主な方法:

被験者は,1ヶ月間にわたって視野を逆転させるプリズムメガネに適応した.
視覚的なタスクでは,提示された手と自己表現を一致させることで,新しい手の表現を評価しました.
機能性磁気共鳴画像 (fMRI) は,脳の活動を観察するために使用されました.

主要な成果:

適応から1ヶ月以内に,新しい視覚運動手表象が現れ,バイパーセプション (古い表象と新しい表象の使用) を可能にしました.
fMRIは,新しい手表現と関連した左側後部前頭皮質 (Brocaの領域) でのユニークな脳活動を明らかにし,そのほかに,内皮質と前頭皮質の活性化も示した.
新しい手の表現の発展は,空間における知覚されたオブジェクトの位置の適応と相関していた.

結論:

手の表現は視覚運動の変換装置として機能し,空間知覚のための腕中心の基準フレームを確立します.
この研究は,視覚運動適応のための新しい表現を作成する脳の驚くべき可塑性を強調しています.

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