公衆衛生
Monica E Walters1, Emily P Morris1, Jordan D Palms1
1University of Michigan, Ann Arbor, MI, USA.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 23, 2025
まとめ
自己認識されたコントロールは高齢者の認知機能の健康に影響を与える。外部コントロールの低減は、特にマイノリティグループにおいて、認知予備力を高め、認知機能を改善する可能性がある。
科学分野:
- 神経科学
- 心理学
- 老年医学
背景:
- 自己認識されたコントロールは、内的および外的要因を含み、認知機能と関連している。
- 特に多様な高齢者集団において、自己認識されたコントロールから認知機能の健康へと結びつけるメカニズムをさらに解明する必要がある。
- 本研究では、自己認識されたコントロールと脳の維持および認知予備力との関係を調査する。
研究 の 目的:
- 内的および外的自己認識されたコントロールが、縦断的なレジリエンスメカニズムとどのように関連するかを検討する。
- 脳の維持と認知予備力が、自己認識されたコントロールと認知機能の健康を結びつける役割を評価する。
- 高齢者の多様な人種集団におけるこれらの関連を調査する。
主な方法:
- 多様なコホート(非ヒスパニック白人、非ヒスパニック黒人、カリブ系ヒスパニック高齢者)の分析。
- 脳の健康(皮質厚、海馬体積、灰白質体積、白質高信号)および全体的な認知機能の評価。
- 自己認識されたコントロールの予測的および調節的効果を、脳の健康を考慮して認知軌道に評価するための統計モデリング(潜在成長曲線、多群モデル)。
主要な成果:
- カリブ系ヒスパニックにおけるベースラインの皮質厚と内的コントロールの間に正の相関が見られた。
- 外的コントロールは、人種グループ間で海馬体積と様々な関連を示した(非ヒスパニック黒人では正、非ヒスパニック白人では負)。
- より高い外的コントロールは、初期および長期の認知機能の低下を予測し、特にヒスパニックおよび非ヒスパニック黒人において、脳の健康の低下が認知機能に及ぼす負の影響を悪化させた。
結論:
- 認知予備力は、自己認識されたコントロールと認知機能の健康を結びつける上で、脳の維持よりも重要なレジリエンスメカニズムであると考えられる。
- 自己認識されたコントロール、脳の健康、および認知アウトカムの間には、人種グループごとに異なる関連が存在する。
- 特にマイノリティの高齢者において、外的コントロールを低減することを目的とした介入は、認知予備力を介して認知機能の健康を促進する可能性がある。
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