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パルス波形と電流の向きはネットワークレベルのTMS誘発機能的結合を変更する:TMS-EEGからの証拠
Delia Lucarelli1, Giacomo Guidali2, Roberto Guidotti1
1Department of Neuroscience, Imaging and Clinical Sciences, G. D'Annunzio University of Chieti-Pescara, Chieti, Italy; Institute for Advanced Biomedical Technologies, G. D'Annunzio University of Chieti-Pescara, Chieti, Italy.
NeuroImage
|February 9, 2026
まとめ
経頭蓋磁気刺激(TMS)パラメータは、運動系における脳波図(EEG)機能的結合を有意に変更する。これらの効果を理解することは、TMSアプリケーションの最適化とネットワークダイナミクスの解釈にとって重要である。
科学分野:
- 神経科学
- 生体医工学
- 信号処理
背景:
- 同時経頭蓋磁気刺激(TMS)中の脳波図(EEG)データの機能的結合解析は、脳ネットワークダイナミクスへの洞察を提供する。
- TMSパラメータのこれらの結合測定への特定の影響はよく理解されておらず、正確なアプリケーションを制限している。
研究 の 目的:
- 運動系内のEEG機能的結合に対するTMSパルス波形と電流の向きの影響を調査すること。
- アルファ帯とベータ帯でこれらの効果を分析すること。
主な方法:
- オープンアクセスリポジトリを使用した32人の健康な参加者からのEEGデータの分析。
- 単相および二相パルス波形と後から前(PA)および前から後(AP)の電流の向きを変化させた左一次運動野(M1)の刺激。
- さまざまな刺激条件下でのTMS誘発機能的結合パターンの検査。
主要な成果:
- アルファ帯の結合は、TMSパラメータに依存しない、感覚運動領域への広範で右側化されたコミュニケーションを示した。
- ベータ帯の結合は、より局所的で条件依存性であった。
- 単相パルスは二相パルスと比較してアルファ帯の結合を増加させ、AP電流が最も変調を引き起こした。
- 特定の二相刺激パターン(PA-AP vs. AP-PA)は、アルファ帯とベータ帯の結合を異なるように変調した。
結論:
- TMSパラメータは、運動系の振動ダイナミクスと機能的結合を有意に変調する。
- TMSフィーチャーの選択は、異なる機能的ネットワークを選択的に活性化でき、TMSアプリケーションのばらつきに寄与する。
- 発見は、適切なTMSパラメータを選択することの重要性を強調し、運動系のコミュニケーションにおける周波数特異的なパターンを確認する。
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