メカノセンサリー背中角の細胞とシナプス構造
Victoria E Abraira1, Emily D Kuehn2, Anda M Chirila1
1Department of Neurobiology, Howard Hughes Medical Institute, Harvard Medical School, 220 Longwood Avenue, Boston, MA 02115, USA.
Cell
|January 3, 2017
まとめ
研究者たちは 触覚処理に不可欠な 脊髄領域である 深い背中角を調査しました 彼らは,低値メカニカレセプター受容領域 (LTMR-RZ) 内の高度な神経多様性を発見し,触覚知覚のための複雑な感覚処理を明らかにしました.
科学分野:
- 神経科学
- 脊髄 研究
- 感覚 処理
背景:
- 低値メカニカル受容体 (LTMR) の情報処理における深部背中の角の役割はよく理解されていません.
- この領域を理解することは タクティルの知覚メカニズムを解読する鍵です
研究 の 目的:
- 背中の角のLTMR受容領域 (LTMR-RZ) のニューロンの構成要素と機能を特徴付けるためのマウス遺伝的ツールを開発する.
- 触覚知覚における LTMR-RZ 処理の役割を調査する.
- LTMR-RZの組織的論理を明らかにする.
主な方法:
- LTMR-RZ内のニューロンのサブタイプを定義するためにマウスの遺伝子ツールを利用しました.
- 特定されたインターニューロンサブタイプの電気生理学的および形態学的分析を行った.
- LTMR,LTMR-RZ内ニューロン,および他の脊髄ニューロン間のシナプス接続のマッピング.
主要な成果:
- LTMR-RZでは,特異な特性を有する7つの刺激性および4つの抑制性インターニューロンサブタイプを含む,重要なニューロン多様性が発見されました.
- LTMRは4〜11のLTMR-RZ内ニューロンサブタイプにシナプスします.
- 各LTMR-RZインターニューロンは,1〜3のLTMRクラス,脊髄インターニューロン,および皮質脊髄ニューロンから入力を受けます.
結論:
- LTMR-RZは 網膜に匹敵する 驚くべき神経の複雑さを示しています
- LTMR-RZインターニューロンは,触覚知覚のための上昇触覚経路を組織する上で重要な役割を果たします.
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