神経サブスペースの再編成は,価値に基づく意思決定を反映しています
bioRxiv : the preprint server for biology
|February 12, 2026
まとめ
脳の決定は,選択肢が側前頭前皮質 (LPFC) でどのように表現されるかを再編成します. 選択されたオプションは拡張され,正しいアクションを表すサブスペースに回転し,アクション選択を改善します.
科学分野:
- 神経科学は神経科学である.
- 認知神経科学とは
- 意思決定神経科学とは
背景:
- 価値に基づいた意思決定には,選択肢を比較し,行動を導くために選択を伝えることが含まれます.
- 価値に基づいた意思決定のためのニューラル回路は知られているが,決定がオプション表現にどのように影響するかについては,理解されていない.
研究 の 目的:
- 意思決定が,側前頭前皮質 (LPFC) の選択肢のニューラル表現を動的に再編成する方法を調査する.
- 意思決定が行動選択を促進する神経メカニズムを理解する.
主な方法:
- 非ヒト霊長類 (NHP) のLPFCから記録された神経活動.
- NHPはワーキングメモリに2つのオプション-値ペアを順番に表示し,より高い値のオプションを選択した.
- 選択されたオプションと選択されていないオプションのニューラル表現を,意思決定の前と後に分析した.
主要な成果:
- 選択されたオプションと未選択されたオプションのニューラル表現は,決定後の直角的なサブスペースに回転した.
- 選択されたオプションの表現は,プレゼンテーションの順序に関係なく,拡張され,一貫したアクションサブスペースと整列されました.
- 決定の前に,順番に提示されたオプションの表現は,別々に保持されていました.
結論:
- 意思決定は,LPFCにおける神経表現を動的に再編成する.
- このニューラルサブスペースの再編成は,選択されたアクションの選択的かつ効率的な読み取りを容易にする.
- LPFCは,価値に基づく決定を,実行可能な表現に変換する上で重要な役割を果たしています.
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