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自閉症スペクトルに関連する特徴とリスクのある精神状態におけるマイナスの不一致の特徴
Naohito Kaneko1,2, Yuko Higuchi1,2, Noa Tsujii3
1Department of Neuropsychiatry, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama, Japan.
Frontiers in psychiatry
|September 2, 2025
まとめ
自閉症スペクトル障害 (ASD) の特徴を持つ精神病のリスクのある個人は,独特の聴覚処理パターンを示しています. 高リスクの精神状態 (ARMS) の個体におけるより短い周波数偏差マイナティビティ (fMMN) の遅延は,高いASD特性を有する客観的なマーカーとして機能する.
科学分野:
- 神経科学
- 精神科
- 臨床心理学
背景:
- 自閉症スペクトル障害 (ASD) と統合失調症スペクトル障害 (SSD) を区別することは,特に精神病のリスクのある精神状態 (ARMS) の個人に困難です.
- これらの条件を区別し,介入を導くために,客観的なマーカーが必要です.
研究 の 目的:
- ASDの特徴を持つ人と持たないARMSの人の間の不一致ネガティビティ (MMN) パターンの違いを調査する.
- ARMS患者におけるASD特性の潜在的な客観的なマーカーとしてMMNを調査する.
主な方法:
- 49人のARMS患者と45人の健康な対照群を,日本語版の自閉症スペクトル比率 (AQ-J) で評価した.
- 聴覚異常パラダイム (期間偏差および周波数偏差) を用いて,脳電図 (EEG) を記録し,MMNを分析した.
- AQ-Jスコアに基づくARMSサブグループに焦点を当てて,MMNの振幅と遅延のグループ差を比較した.
主要な成果:
- 総合的なARMS群と健康な対照群の間には,有意なMMNの違いが見つかりませんでした.
- 高いASD特質 (AQ(+)) を有するARMS個体は,低いASD特質 (AQ(-) を有する個体と比較して,周波数偏差MMN (fMMN) 遅延期が著しく短かった.
- fMMNのレイテンシーとAQ-Jの合計スコア,特にARMSグループにおけるCommunicationサブスケールとの間の負の相関が観察されました.
結論:
- ARMS患者の高いASD特性は,fMMNの遅延時間短縮と関連しています.
- MMNの潜伏期,特にfMMNは,ARMSの個体におけるASDの特徴を特定するための客観的なバイオマーカーとして機能する.
- この発見はASDの特性を伴う精神病のリスクのある個人に合わせた介入に役立ちます.
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