2つのモーターパターンジェネレーター回路のニューロペプチド融合
P S Dickinson1, C Mecsas, E Marder
1Biology Department, Bowdoin College, Brunswick, Maine.
Nature
|March 8, 1990
まとめ
神経ペプチド赤色素濃縮ホルモンは,ロブスターの2つの独立した神経ネットワークを融合させます. このペプチドはシナプス相互作用を調節し,単一の神経回路が多様な運動出力を生成することを可能にします.
科学分野:
- 神経科学は神経科学である.
- 動物の行動 動物の行動
- ペプチドシグナリング
背景:
- 動物の動きは,協調されたニューラルネットワークに依存しています.
- 調節物質は,ニューラルネットワークの出力を変化させることができる.
- 胃口神経系は,甲殻類の餌の行動を制御する.
研究 の 目的:
- 神経ネットワークの相互作用を調節する赤い色素濃縮ホルモンの役割を調査する.
- ニューロペプチドが神経回路の機能的構成にどのように影響するかを理解する.
主な方法:
- ロブスターの胃口神経系における電気生理学的記録.
- 神経パターン生成ネットワーク間のシナプス相互作用の分析.
- 赤い色素濃縮ホルモンを適用して,ネットワーク活動への影響を観察する.
主要な成果:
- 赤色素濃縮ホルモンは,心臓 sac と胃ミールネットワークの間のシナプス相互作用を大幅に強化します.
- ホルモンは,以前に独立したネットワークを単一の機能的ユニットに統合することを促進します.
- この融合により,オリジナルのネットワークとは異なる新しい運用モードが生まれます.
結論:
- 赤色素濃縮ホルモンのような神経ペプチドは,神経回路を動的に再構成することができます.
- 同じニューロンは,ネットワークの相互作用を変えることで,異なる出力を生み出すことができます.
- これにより,変化する状況に対応した柔軟なモーター制御のメカニズムが提供されます.
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