前頭前皮質-脳幹のニューロン投影で,行動的な挑戦に対する反応を制御する.
Melissa R Warden1, Aslihan Selimbeyoglu, Julie J Mirzabekov
1Department of Bioengineering, Stanford University, Stanford, California 94305, USA. mwarden@stanford.edu
Nature
|November 20, 2012
まとめ
背面ラフェ核 (DRN) に発射する特定の中部前頭前皮質 (mPFC) 細胞は,因果的に積極的な行動反応を制御する. これらのmPFC-DRN経路の活性化は,困難な状況での行動選択に急速に影響します.
科学分野:
- 神経科学は神経科学である.
- 行動神経科学は,行動神経科学である.
- 計算神経科学とは
背景:
- 前頭前皮質 (PFC) は行動制御において重要な役割を果たしており,機能不全は衝動性や動機づけに結びついている.
- 努力的な行動を駆動するPFC内の特定の神経回路を理解することは,行動障害に対処するために不可欠です.
研究 の 目的:
- 課題に対する積極的な行動的反応の選択の基礎となる中部前頭前皮質 (mPFC) の回路を調査する.
- mPFC内の特定のニューロン集団を特定し,行動選択と動機付けに因果的に影響を与える.
主な方法:
- 自由に移動するネズミの活発な行動反応の継続的な評価のための定量的な方法を開発した.
- ニューラル活動のリアルタイムモニタリングと操作のための単一ユニット電気生理学と光遺伝学を利用した.
- 特定の下流接続を持つmPFCニューロンを選択的に活性化するために,投影ターゲティング光遺伝学を使用しました.
主要な成果:
- 多くのmPFCニューロンは,行動する決定に関連した発射パターンの瞬間的調節を示した.
- 一般的なmPFC主要ニューロンの直接活性化は,活発な行動に影響を与えない.
- 背面ラフェ核 (DRN) に発射するmPFC細胞の選択的活性化により,活発な行動状態の選択が深刻かつ可逆的に変化しました.
結論:
- DRNへの投影によって定義される特定のmPFCサブ集団は,積極的な行動応答を駆動するために重要である.
- これらの発見は,行動選択とモチベーションのニューラルメカニズムに光を当てています.
- 結果は,うつ病などの状態に潜在的に関連する正常および病理的な動機付けの基礎にある神経回路の洞察を提供します.
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