空間的な分離とニューロゲネシスのタイミングによって暴露されたモーターアンタゴニズム

Marco Tripodi¹, Anna E Stepien, Silvia Arber

¹Biozentrum, Department of Cell Biology, University of Basel, 4056 Basel, Switzerland.

Nature

|October 21, 2011

まとめ

研究者らは,歩行中に敵対的な筋肉の活性化を制御する神経回路をマッピングした. 彼らは,前運動内ニューロンの空間的分離を発見し,これは運動制御と筋肉の調整に不可欠です.

科学分野:

神経科学は神経科学である.
モーター・コントロール・コントロール
発達生物学発達生物学とは

背景:

ウォーキングは,敵対的な筋肉群 (伸縮筋と屈折筋) の調整された活性化に依存しています.
これらの敵対的な筋肉の活性化を制御する正確な神経回路は,完全に理解されていません.

研究の目的:

移動中の伸縮筋・屈折筋の活性化を制御する前運動の解剖学的基底を解明する.
これらの神経回路の分離の基礎となる発達メカニズムを調査する.

主な方法:

モノシナプス的に制限されたトランスシナプスウイルスを使用して,マウスの正確な回路追跡を行いました.
前運動内ニューロンの空間的組織と発達の起源を分析した.
電子回路の発達における自受性感覚フィードバックの役割を調査した.

主要な成果:

背脊髄の拡張神経と屈折神経前運動内ニューロンの中側側空間分離を特定した.
これらのインターニューロン集団は共通の原始ドメインから発生するが,神経生成のタイミングに基づいて分離することを示した.
発見された親感受性感覚フィードバックは,中間拡張器前運動集団を標的とし,拡張器特有の接続性の発達に不可欠です.

結論:

前運動内ニューロンレベルで敵対的な筋肉制御回路のための明確な解剖学的基礎を確立した.
異なる筋肉の動作のための運動制御回路の確立におけるシナプス入力と発達タイミングの役割を強調した.

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