上部コリキュルスの標的選択と動きの仕様のための別々の信号
1Howard Hughes Medical Institute and Department of Neurobiology, Stanford University School of Medicine, Stanford, CA 94305, USA.
Science (New York, N.Y.)
|May 15, 1999
まとめ
脳は選択プロセスを用いて,サッカード標的を選びます. 一部の上級コリキュルニューロンは標的の選択を助け,他のものは選択後目の動きを準備する.
科学分野:
- 神経科学は神経科学である.
- オキュロモーターの研究
- ビジュアル処理 ビジュアル処理
背景:
- 脳は複数の選択肢からサッカード標的を選択しなければならない.
- 上部コリキュルス (SC) ニューロンは,サッカデスの前に活動を示しますが,その役割は議論されています.
研究 の 目的:
- サッカード標的の選択におけるSCニューロンの役割を調査する.
- SCニューロンの選択前と選択後の機能を区別する.
主な方法:
- モーション・ディレクションベースのサッカードタスクを実行しているサルにおけるSCニューロン活動を記録する.
主要な成果:
- いくつかのSCニューロンは方向選択的視覚反応を示し,標的の選択における役割を果たしていることを示した.
- 他のSCニューロンは,選択後のサッカードパラメータの仕様に関与しているように見えた.
結論:
- SCニューロンは,サッカード標的の選択と,その後の眼球の動きの準備の両方において,異なる役割を果たします.
- 証拠は,眼運動系におけるSCニューロンの二重機能を示唆している.
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