フードフォワードは保存されているが,植生状態では上から下へのプロセスが損なわれている
Melanie Boly1, Marta Isabel Garrido, Olivia Gosseries
1Coma Science Group, Cyclotron Research Centre and Neurology Department, University of Liège and CHU Sart Tilman Hospital, 4000 Liège, Belgium. mboly@ulg.ac.be
まとめ
脳における上から下への処理の障害,特に前頭皮質から頭皮質への後方接続は,重度の脳損傷を有する患者の意識の重要な指標です. この発見は,意識的知覚における再帰的処理の役割を強調しています.
科学分野:
- 神経科学は神経科学である.
- 認知神経科学とは
- 臨床神経学 臨床神経学
背景:
- フロントペリエタル皮質は,明示的および潜在的刺激処理の両方で役割を果たします.
- 重度の脳損傷患者の意識は,信頼性の高い評価が難しい.
- トップダウンプロセスと長時間潜伏する電気生理学的反応は,潜在的に意識の相関関係である.
研究 の 目的:
- 意識における上から下への処理の役割を調査する.
- 植物状態の患者における意識の信頼できる神経相関を特定する.
- フロントペリエタル反応をリキュアント・プロセッシング・メジャーと比較する.
主な方法:
- 不一致のネガティビティパラダイムを使用して有効な接続性を測定しました.
- 植物状態の患者と健康な対照群の脳の活動を比較した.
- 前頭皮から側頭皮への後方接続に焦点を当てた.
主要な成果:
- 観察された主な違いは,対照群と比較して,ベジタティブ状態の患者の後方接続性の障害でした.
- フロント対対の応答は有意な差異を示さなかった.
- トップダウン予測におけるこの損益は,再発処理に特異的であった.
結論:
- 前頭皮質から側頭皮質への後方接続の障害は,重度の脳損傷患者における意識の信頼性の高い相関値である.
- トップダウンの投影は,繰り返しの処理と意識的な知覚に不可欠です.
- この発見は,意識の評価のための再発性ニューロンのメッセージ伝達を評価することの重要性を強調しています.
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