マルモセットの聴覚皮質でタスクの際に音の位置を動的に表現する
bioRxiv : the preprint server for biology
|September 2, 2025
まとめ
行動的な要求は 聴覚皮質の反応を 監視されている音の場所だけでなく 監視されていない音の場所にも強化します これは 課題の要求が これまで考えられていたより 幅広いニューラルネットワークを 採用することを示唆しています
科学分野:
- 神経科学
- 聴覚神経科学
- 計算神経科学
背景:
- 聴覚皮質の神経反応は 特定の場所への注意など 行動目標によって調整されます
- 神経活動と行動に対する受容外場 (RF) の刺激の影響は,まだあまり理解されていません.
研究 の 目的:
- 聴覚皮質の神経細胞の古典的な受容領域 (RF) の外で提示される音に対する神経反応をどのように行動要求が調節するかを調査する.
- 空間受容場のタスク関連変調の基礎にある神経メカニズムを探求する.
主な方法:
- マルモセットは ニューロンの内部と外の両方で 聴覚刺激に耳を傾けるよう訓練されました
- 電気生理学的記録はニューロンの発火率と膜ポテンシャルを測定するために使用されました.
- 観察された神経調節をシミュレートし理解するために計算型正規化モデルが採用されました.
主要な成果:
- 大半の聴覚皮質ニューロンは RF内の刺激に対して 発火速度が増加したことを示した.
- タスクの要求は,RFの外の刺激に対して有意な促進を誘導し,受動的なリスニング中にRFセンターの刺激に対する反応を上回る.
- このオフRFの促進は,ロストラルとプライマリー聴覚皮質と比較して尾の聴覚領域でより一般的でした.
- 標準化モデルと一致する広範な抑制と超極化が,オフRF刺激で観察された.
結論:
- 行動的なタスクは 聴覚神経のより広いネットワークを 募集します 聴覚神経は 受動的なリスニングで ターゲット刺激に直接反応します
- 聴覚皮質の空間的受容場のダイナミックで適応的な性質を示唆している.
- 広範囲にわたる抑制は ニューラル反応の形成と 聴覚皮質における 特定のタスクの処理を可能にするために 重要な役割を果たします
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