急速な膀の再充電と大きなプールにより,中央シナプスで高帯域幅の伝送が維持されます
Chiara Saviane1, R Angus Silver
1Department of Physiology, University College London, Gower Street, London WC1E 6BT, UK.
Nature
|February 24, 2006
まとめ
脳のの繊維は,高周波シグナルを送信し,シナプス伝送率に関する以前の仮定に異議を唱えます. これは,大規模な膀プールと急速なリロードによって可能であり,広帯域情報転送を可能にします.
科学分野:
- 神経科学は神経科学である.
- シナプス伝送 シナプス伝送
- 大脳皮質の機能
背景:
- 高周波シナプス信号は,中央刺激シナプスの短い突発に限られることが多い.
- グラデッド・リボン型シナプスは,持続的な高速な情報伝達を行うことで知られています.
- 以前は,持続的な高周波シグナルを送信するための,小脳モスファイバー端末の容量は不明確でした.
研究 の 目的:
- cerebellar mossyファイバー端末の持続的な高周波信号の背後にあるメカニズムを調査する.
- 短期的な可塑性および持続的な伝播の定量決定因子を決定する.
- ブロードバンド幅のレートコード情報を送信するためのモスファイバーの適性を評価する.
主な方法:
- 変動分析と薬理学的な脱敏感化ブロックを使用して,定量決定因子を特定します.
- 短期的な可塑性モデリングと累積的な刺激性シナプス後電流分析.
- 生理学的温度での脳小胞のモス繊維-粒子の細胞接続での伝播の調査.
主要な成果:
- 脳のの繊維-粒子の細胞接続は,生理学的温度で高周波シグナルを送信します.
- 放出は,放出可能な大きなプールから (約. サイトごとに300個の膀).
- 短期的な可塑性は,量子的な放出と膀プールダイナミクスによって決定されます.
結論:
- 持続的な高頻度の膀放出は,リボン型シナプスに限ったものではありません.
- 脳のの繊維は,広帯域,レートコード化された情報を伝送するのに適しています.
- これらの発見は,脳内のシナプス伝達限界の理解を再定義します.
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