臨床的特徴
Caitlin M Terao1, Fareshte Erani2,3, Sarah J Banks2
1San Diego State University/University of California San Diego Joint Doctoral Program in Clinical Psychology, San Diego, CA, USA.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 25, 2025
まとめ
認知的個人内変動(IIV)は、高齢者における脳容積との性特異的な関連を示す。実行機能のIIVは男性の脳領域に影響を与え、言語のIIVは女性の脳領域に影響を与える。これは脳の老化の異なるパターンを示唆している。
科学分野:
- 神経科学
- 老年医学
- 認知科学
背景:
- 認知的個人内変動(IIV)は、神経変性および認知機能低下と関連しています。
- 脳の健康に対するIIVの関連における性差を理解することは重要ですが、十分に調査されていません。
研究 の 目的:
- 高齢の男性と女性における認知的IIVと脳容積との間の差次的な関連を調査すること。
- IIVと構造的脳変化の関係における性特異的なパターンを特定すること。
主な方法:
- ボルチモア縦断的高齢化研究から、認知的に健常な高齢者867人のデータを利用しました。
- 神経心理学的検査から、全体的および領域特異的なIIV(実行機能、記憶、言語)を計算しました。
- 共変量を調整して、IIV指標と脳領域の容積(灰白質および白質)との関連を構造的MRIを使用して分析しました。
主要な成果:
- 実行機能のIIVは、全サンプルでより小さな側頭葉、辺縁系、および皮質下領域の容積と関連していました。
- 男性では、実行機能のIIVが高いほど、辺縁系および後頭葉の容積が小さいことと関連していました。
- 女性では、言語のIIVが高いほど、側頭葉、頭頂葉、および後頭葉の容積が小さいことと関連していました。
結論:
- 実行機能のIIVは、性別を超えて脳容積と関連しており、男性では特定の関連が見られました。
- 言語のIIVは、特に女性において、脳容積との性特異的な関連を示しました。
- これらのパターンの根底にある性特異的なメカニズムを調査するためには、さらなる縦断的研究が必要です。
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