トランスシナプス・トレーシングによる嗅覚インプットの皮質表現.
Kazunari Miyamichi1, Fernando Amat, Farshid Moussavi
1HHMI/Department of Biology, Stanford University, Stanford, California 94305, USA.
Nature
|December 24, 2010
まとめ
研究者はマウスの嗅覚経路をマッピングし,嗅覚球の匂いのマップが皮質でどのように処理されるかを明らかにしました. 個々の皮質ニューロンは,広く分布した嗅覚球の球球から信号を統合し,異なる皮質領域は,異なる入力パターンを示しています.
科学分野:
- 神経科学は神経科学である.
- 嗅覚系の研究 嗅覚系の研究
- コネクトコミックス (Connectomics) は,コネクトコミックス (Connectomics) を本棚に登録しているひと
背景:
- マウスの嗅覚球は,嗅覚受容体ニューロンから特定のグルメリュルへの収束性軸突投影を通じて匂いのマップを作成します.
- 嗅覚球の嗅覚マップが嗅覚皮質内で表現される様子は,ほとんど特徴づけられていないままである.
研究 の 目的:
- 嗅覚球の匂いのマップが嗅覚皮質でどのように表現されているかを調査する.
- 嗅覚入力を受信する皮質ニューロンのプレシナプス接続性を解明する.
主な方法:
- 狂犬病ウイルス依存逆行性モノトランスシナプスラベリングを使用した.
- 前シナプス入力を追跡するための"スタート"の皮質ニューロンを制御する遺伝的技術を採用した.
主要な成果:
- 個々の皮質ニューロンは,複数のミトラ細胞から収束した入力を受け,広範囲に分布したグルメリルを表しています.
- 皮質領域における嗅覚球のインプットの差異的表現が示され,皮質の桃体は背面のインプットとピリフォームド皮質のサンプル採取を広く好む.
結論:
- 異なる嗅覚皮質領域は,嗅覚球の情報を異なる方法で処理し,おそらく匂いの好みと記憶における特殊な機能を反映しています.
- 開発されたトランスシナプスラベリングテクニックは,マウスの神経系全体のニューラル接続をマッピングするための汎用的なツールを提供します.
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