意図された眼の動きによって,視床皮質の視覚空間表現の更新
J R Duhamel1, C L Colby, M E Goldberg
1Laboratory of Sensorimotor Research, National Eye Institute, National Institutes of Health, Bethesda, MD 20892.
Science (New York, N.Y.)
|January 3, 1992
まとめ
表面皮質は,運動前に神経受容場をシフトすることによって,目の動きを予想します. この脳の領域は,視覚空間表現を更新し,目のシフトにもかかわらず正確な知覚を保証します.
科学分野:
- 神経科学は神経科学である.
- 視覚的知覚 視覚的知覚
- 認知神経科学とは
背景:
- 目の動きは,網膜のイメージを絶えず変化させます.
- 視覚ニューロンは,新しい視覚空間を追跡するために,目とともに動く受容場を持っています.
- 目の動きの間に脳が安定した視覚世界を維持する方法を理解することは,非常に重要です.
研究 の 目的:
- 眼球の動きと視覚空間を処理する側頭部ニューロンの役割を調査する.
- 眼球の神経細胞が眼球の動きの結果を予測するかどうかを判断する.
- 垂体皮質がサッカデスの間に視覚情報を更新する方法を探る.
主な方法:
- 自然主義的なタスク中に霊長類の parietal ニューロンからの電気生理学的記録.
- 目の動きの開始と視覚的刺激に関連した神経応答の分析.
- 目の動きの前,その間,そしてその後の受容領域の位置をマッピングする.
主要な成果:
- 眼球の動きに先立つ受容場位置の一時的なシフトが表れた parietal ニューロンもありました.
- 記録されたほぼすべての parietal ニューロンは,目の動きが以前に提示された刺激を彼らの受容領域に持ち込んだときに反応した.
- 表面皮質の活動は,目の動きによって調節されるという証拠があります.
結論:
- 表面皮質は,目の動きが網膜に及ぼす影響を予測する上で重要な役割を果たします.
- この脳の領域は,記憶された視覚刺激の空間座標を更新することに貢献します.
- これらのメカニズムは,視覚空間の安定的かつ正確な表現を生成するために不可欠です.
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