統合失調症における安静時ガンマパワー:系統的レビューとメタアナリシス
Yong Liu1,2, Pingping Xu3, Shaohua Hu1,2,4,5,6,7,8
1Department of Psychiatry, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.
Frontiers in psychiatry
|February 4, 2026
まとめ
統合失調症患者では安静時ガンマパワーが上昇しているが、この効果は小さく、著しく変動する。病気の期間や投薬状況がこれらのガンマ帯振動の所見に影響を与える。
科学分野:
- 神経科学; 精神医学; 生体医工学
背景:
- ガンマ帯振動は脳機能に不可欠であり、統合失調症に関与している。; 統合失調症における安静時ガンマ活動に関する以前の研究では、一貫性のない結果が示されている。
研究 の 目的:
- 統合失調症における安静時ガンマ活動に関する研究を系統的にレビューし、メタアナリシスを行うこと。; 全体的な効果量を確認し、異質性に寄与する要因を特定すること。
主な方法:
- EEGおよびMEG研究の系統的レビューとメタアナリシス。; 20の研究(患者998人、対照群952人)を含め、ニューカッスル・オタワ尺度を用いて質を評価した。; ランダム効果モデルを用いて、プールされた標準化平均差(Hedges' g)を計算した。
主要な成果:
- 統合失調症における全脳ガンマパワーの有意な上昇(g=0.371)。; 前頭葉および側頭葉皮質で増加が観察されたが、他の領域では一貫性がなかった。; 病気の期間と投薬状況がガンマパワーの上昇を予測した。; 開眼条件では効果が減弱した。
結論:
- 統合失調症における安静時ガンマパワーの違いは、小さく異質な集団効果である。; 所見は、病気の期間、投薬、および記録条件の影響を受ける。; 機序を明らかにするためには、未服薬の初回エピソード患者におけるさらなる研究が必要である。
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