脳のイベントとオブジェクトの概念のための共通の表現コード
Jia-Qing Tong1, Jeffrey R Binder1,2, Lisa L Conant1
1Department of Neurology, Medical College of Wisconsin, Milwaukee, WI, USA.
まとめ
オブジェクトとイベントの概念のニューラル表現は 異なるカテゴリーではなく 経験的な特徴に基づいた共通のコードを共有しています この発見は意味表現と脳とコンピュータの インタフェースの理解を進めるものです
科学分野:
- 神経科学
- 認知科学
- 心理言語学
背景:
- 人間はオブジェクトとイベントの概念を使用して世界を概念化します.
- オブジェクトとイベントの概念を区別する神経の基礎は不明です.
- 共有されたまたは異なるニューラルコードを調査することは,意味表現を理解するために不可欠です.
研究 の 目的:
- オブジェクトとイベントの概念のニューラル表現が明確に区別されているか,または共通のコードを共有しているかを決定します.
- 参加者の機能的磁気共鳴画像 (fMRI) データを分析し,オブジェクトとイベントの概念を評価する.
- 神経活動から概念的なコンテンツをデコードする機能ベースのモデルをテストする.
主な方法:
- 機能性磁気共鳴画像 (fMRI) を用いて脳活動データを収集した.
- fMRIデータにはマルチボキセルパターン分析 (MVPA) が適用された.
- 体験的な機能評価を用いた機能ベースのモデルが開発され,テストされました.
主要な成果:
- オブジェクトとイベントのコンセプトは,アソシエーションの皮質全体に重なり合うパターンで表現されます.
- 経験的な特徴に基づいた共有された表現コードは,両方の概念型を裏付けています.
- この機能ベースのコードは 関連する脳領域の オブジェクトとイベントの概念を 解読することに成功しました
結論:
- オブジェクトとイベントの表現の間の神経解剖学的違いは,特徴分布の定量的な変化から生じる.
- 経験的な特徴に基づいた共有された表現コードは,様々な意味論的概念の 神経のエンコーディングを説明します.
- 発見は神経活動から概念的なコンテンツをデコードするための脳コンピュータインターフェースの開発をサポートします.
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