ミニットスケールの振動シーケンス
Soledad Gonzalo Cogno1, Horst A Obenhaus2, Ane Lautrup2
1Kavli Institute for Systems Neuroscience and Centre for Algorithms in the Cortex, Fred Kavli Building, Norwegian University of Science and Technology, Trondheim, Norway. soledad.g.cogno@ntnu.no.
Nature
|December 20, 2023
まとめ
研究者らはマウスの中部内皮質 (MEC) で超低速の振動を発見した. これらの脳波は ニューロンの活動を数分間にわたって シーケンスに編み込み 空間的なナビゲーションと記憶を 助ける可能性があります
科学分野:
- 神経科学
- システム神経科学
- 計算神経科学
背景:
- 空間的ナビゲーションとエピソード的記憶には 中部内皮質 (MEC) が不可欠です
- MECの神経活動は,これらの機能のために長い時間スケール (秒から分) にわたって組織化する必要があります.
- MEC細胞の空間的調整は知られているが,行動的に関連する期間におけるそれらの活動の時間的組織は不明である.
研究 の 目的:
- MECにおけるニューロンの活動の時間的組織を,秒から分までの時間スケールで調査する.
- MECニューロンの活動が振動パターンと連続的な組織を示すかどうかを判断する.
- ナビゲーションと記憶における 時間のパターンの役割を探る
主な方法:
- ネズミのMECにおける神経活動の電気生理学的記録
- 制御された環境での移動中の神経活動の分析 (暗闇で回転する車輪).
- MECの振動パターンを隣接する脳領域 (パラズビキュラム,視覚皮質) と比較する.
主要な成果:
- MECニューロンの活動は,自発的に超遅い振動 (数十秒から数分) に組織されます.
- これらの振動は,MEC細胞集団の大部分を含む周期的なシーケンスを含んでいた.
- このような振動配列はMECに特異的であり,パラズビキュラムや視覚皮質では観察されなかった.
- 位置や方向や報酬に 依存しない状態で 続きました
結論:
- MECは超低速の振動配列を示し ニューロンの活動を長期にわたって組織します
- これらの超遅い振動配列は,ナビゲーションと記憶の間に神経通信と配列形成の枠組みを提供する可能性があります.
- MECにおけるこの時間的組織は,時間の経過とともに経験を統合するための根本的なメカニズムである可能性があります.
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