人間の視力における色と光度運動機構のコントラスト依存性

M J Hawken¹, K R Gegenfurtner, C Tang

¹Center for Neural Science, New York University, New York 10003.

Nature

|January 20, 1994

まとめ

視覚知覚の研究は,遅い動きと速い動きの異なる経路を明らかにしています. スローモーションは,それぞれ別の光度と色の経路を使用し,高速モーションは,単一の色盲の経路を使用します.

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
センサリーシステムセンサリーシステム

背景:

伝統的なモデルは,色と動きの知覚のための別々の,専門的な経路を示唆しています.
新興の証拠は,運動知覚が複雑で,注意,明るさ,色によって影響されていることを示しています.

研究の目的:

光度および色素刺激を用いて視覚運動経路の特徴を調査する.
単一の運動経路が光度と色彩情報を処理しているか,または異なる経路が存在するかどうかを判断する.

主な方法:

異なる刺激コントラストの間で知覚速度を比較するために,強固な速度マッチングタスクを使用しました.
単光度における光度と色素標的の直接比較のために相対的コントラストスケールを利用した.

主要な成果:

単発光度でゆっくり動く色の標的は,感知速度に急激なコントラスト依存を示しました.
ゆっくり動く照明ターゲットは,コントラスト依存性が著しく低下した.
急速な動きは,光度と単発光源の両方の刺激に対して,低いコントラスト依存を示し,明確なメカニズムを示唆しました.

結論:

証拠は,スローモーションのための2つの独立した経路を支持しています:一つは明るさ感受性,もう一つは色感受性です.
ファストモーションは,色盲ではない単一のコントラストインヴァリアント経路によって処理されます.

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