自動音声生成における神経ダイナミクス
bioRxiv : the preprint server for biology
|February 23, 2026
まとめ
自動音声は広範な脳ネットワークを関与させ、音声運動皮質の伝統的な見方に挑戦します。この研究は、習熟した音声タスク中の神経制御における複雑なフィードフォワードおよびフィードバックダイナミクスを明らかにします。
科学分野:
- 神経科学; 音声運動制御; 計算神経科学
背景:
- 音声運動皮質はヒトの音声に不可欠です。 伝統的な見方は、その役割を調音と体性感覚に限定しています。 自動音声処理は十分に理解されていません。
研究 の 目的:
- 自動音声生成中の神経ダイナミクスを調査します。 習熟した音声における皮質動員とタイミングを調べます。 自動音声における音声運動皮質の役割を明確にします。
主な方法:
- 左シルヴィウス溝周囲皮質からの頭蓋内電気皮質図(ECoG)記録。 エンコーディングモデル(多変量時間応答関数)。 デコーディングモデル(深層ニューラルネットワーク音声合成)。
主要な成果:
- 自動音声は、分散ネットワーク(上側頭皮質、中心前回皮質、中心後皮質)を関与させます。 先行運動活動の減衰と、より弱い前頭部エンコーディングが観察されました。 音声運動皮質は、フィードフォワード/フィードバック信号が混在し、一部は完全にフィードフォワードサイトです。
結論:
- 自動音声は、以前考えられていたよりも広範な皮質ネットワークを利用します。 音声運動皮質は、純粋なフィードフォワード制御を超えた複雑なダイナミクスを示します。 発見は、自動音声処理の時空間的編成を再定義します。
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