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望ましくない記憶の抑圧を支える神経系
Michael C Anderson1, Kevin N Ochsner, Brice Kuhl
1Department of Psychology, University of Oregon, Eugene, OR 97403, USA. mcanders@darkwing.uoregon.edu
まとめ
科学者たちは脳画像を用いて,私たちが望ましくない記憶を積極的に忘れる方法を研究しました. 前頭前野活動の増加と海馬活動減少は,記憶を成功裏に抑制することと関連しており,動機付けられた忘却の生物学的根拠を示唆しています.
科学分野:
- 神経科学は神経科学である.
- 認知心理学とは,認知心理学である.
背景:
- シグムント・フロイトは,望ましくない記憶を意識から積極的に排除できる,抑圧と呼ばれるプロセスを提案しました.
- この動機づけられた忘却の背後にある正確な神経機構は,ほとんど不明のままです.
研究 の 目的:
- 意識から望ましくない記憶を積極的に抑制する神経系を特定する.
- 動機付けられた忘却のプロセスにおける脳の役割を調査する.
主な方法:
- 機能性磁気共鳴画像 (fMRI) は,記憶制御のタスク中に脳活動を観察するために使用されました.
- 参加者は,望ましくない記憶を誘発し,その後抑制するように設計されたタスクに従事しています.
主要な成果:
- 望ましくない記憶のコントロールは,ドロソラテラル前頭皮質の活性化の増加と相関しています.
- 記憶抑制の際に海馬の活性化が低下することが観察されました.
- 抑圧された記憶の記憶障害は明らかで,忘却の大きさは前頭前野と海馬の活動によって予測される.
結論:
- この発見は,生物学的根拠に基づいた忘却プロセスが活発である証拠を提供している.
- 動機付けられた忘却と記憶制御に関する将来の研究を導くために,神経生物学的モデルが提案されています.
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