視覚皮質の運動と前頭葉の信号は,自己と外部から生成された視覚運動の分離を可能にします
Mateo Vélez-Fort1, Lee Cossell1, Laura Porta1
1Sainsbury Wellcome Centre, University College London, London, UK.
Cell
|February 20, 2025
まとめ
脳は視覚的,運動的,前庭的信号を用いて 自己運動と世界運動を分離します 走るスピードは 視覚野で視覚的動きが 処理される方法に影響し 脳の全域で 自己速度を基準にします
科学分野:
- 神経科学
- 感覚処理
- 計算神経科学
背景:
- 自己運動と環境運動を 区別することは 生き残るために不可欠です
- 脳の運動源分離の ニューラルメカニズムは 未知のままです
- この過程における視覚系の役割,特に運動と前頭葉の入力を統合する役割は,さらなる調査を必要とします.
研究 の 目的:
- マウスの主視野皮質 (VISp) が運動,前庭,視覚運動信号を統合する方法を調査する.
- 脳の自己運動と外部の運動を 感覚の入力によって 区別する方法を理解する
- 移動中の運動源分離の神経基礎を解明する.
主な方法:
- 目覚めたマウスの頭部に 2フォトンのカルシウム画像を用いた
- 主要視野皮質 (VISp) の神経活動が制御された視野流動刺激中に記録された.
- アクティブ対パッシブ自己運動のシグナルを分離するために操作された移動 (走行) と被動的頭部トランスレーション.
主要な成果:
- 主要視野皮質 (VISp) は,頭の運動状態 (静止,受動,またはアクティブトランスレーション) に基づいて視覚の流れを差異的に表します.
- 移動 (走行) は,走行速度と一致する視覚変換の入力を積極的に抑制します.
- 視覚翻訳信号は,実行と翻訳速度が不一致しているときにVISpで優位性を得る.
結論:
- 運動信号と前頭葉信号は 視覚処理を動的に調整します
- 脳はモーターとベスティブル情報を 交互に統合して エゴ中心の基準枠を確立します
- この自己中心のフレームは 動的環境で自己運動速度を正確に計算するのに不可欠です
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