臨床症状
Layaly Shihadeh1, Stephen A Coombes2,3, Emily Ahne1
1Florida Atlantic University, Davie, FL, USA.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 26, 2025
まとめ
言語流暢性課題における侵入率は、認知機能低下および脳の変化と関連しています。侵入率が高いほど認知症および前頭葉の容積減少と相関し、加齢に関連する認知障害の潜在的なマーカーとなる可能性が示唆されます。
科学分野:
- 神経科学;認知心理学;老年医学
背景:
- 言語記憶における侵入は、高齢化における認知機能低下の既知の指標です。;VF課題における侵入の重要性はあまり理解されていません。
研究 の 目的:
- 音韻性(PF)およびカテゴリー(CF)VF課題における侵入率が、認知診断群間で異なるかどうかを調査すること。;これらの違いを3年間にわたって経時的に調べること。;VF侵入と前頭葉、側頭葉、および海馬の脳容積との関連を決定すること。
主な方法:
- 様々な認知状態(認知機能正常、MCI、認知症)の参加者を対象とした1Floridaアルツハイマー病研究センター(ADRC)からの参加者の分析。;PFおよびCF課題からの侵入率を3年間にわたって収集しました。;ベースライン時にMRIスキャンを使用して脳容積を評価しました。
主要な成果:
- 侵入率(パーセンテージ)は、2年目と3年目の診断グループ間で有意に異なり、認知状態との関連を示唆しました。;認知症の患者は、認知機能正常者と比較して侵入率が高かったです。;ベースラインのVF侵入率が高いほど、前頭葉および側頭葉の脳領域、特に左前頭極および左尾側中前頭野の容積減少と相関しました。
結論:
- 言語流暢性課題における侵入率は、高齢化における認知機能低下の敏感な指標となる可能性があります。;これらの侵入率は、左前頭葉の構造的変化と関連しています。
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