ピラミッド細胞におけるタイムリーフィデリティの強制は,体的フィードフォワード阻害によって行われる
1Brain Research Institute, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland.
Science (New York, N.Y.)
|August 11, 2001
まとめ
ネズミの海馬ピラミッド細胞におけるニューロン統合は,急速なフィード・フォワードの阻害により,狭い時間解像度 (2ミリ秒未満) を有する. この阻害はソマではデンドライトよりも強く,独特の統合ウィンドウを作成します.
科学分野:
- 神経科学は神経科学である.
- 計算神経科学とは
- 細胞神経科学は細胞神経科学である.
背景:
- ニューロンの統合は,スパイク生成の時間的な解像度を決定します.
- 刺激的な入力総和の時間枠を理解することは極めて重要です.
研究 の 目的:
- ネズミの海馬ピラミッド細胞におけるニューロン統合の時間的な解像度を調査する.
- このタイムウィンドウの形成におけるフィード・フォワード・インヒビションの役割を解明する.
主な方法:
- ネズミのヒポカンパのピラミッド細胞で同時に体とデンドリットを記録する.
- 刺激的および阻害的シナプス入力タイミングと総括の分析.
主要な成果:
- ネズミの海馬ピラミッド細胞の統合時間窓は狭く,2ミリ秒未満です.
- ディシナプス的なフィードフォワード阻害は,単シナプス刺激に素早く続いており,狭いウィンドウに寄与します.
- フィード・フォワードの阻害は,デンドライトと比較して,ソマに著しく強くなります.
結論:
- フィードフォワード阻害のサブセルラー分割は,明確な統合時間ウィンドウを作成します.
- 精密な偶然の検出は soma で強制されます.
- デンドライトはより広い統合ウィンドウを示し,より長い期間にわたってサマテーションを可能にします.
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