空間パターンの認識された位置に対する運動信号の影響
1Human and Information Science Research Laboratory, NTT Communication Science Laboratories, Kanagawa, Japan.
Nature
|March 2, 1999
まとめ
モーションアフターエフェクト (MAE) は,通常,知覚された位置を変えることはありません. しかし,この研究では,回転運動に適応すると,認識された方向性が徐々に変化し,運動分析が空間表現を動的に更新することを示唆しています.
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
- 計算神経科学とは
背景:
- モーションアフターエフェクト (Motion After Effect,MAE) は,動いているパターンを観察した後に静的な物体が反対方向に動いているように見える視覚的錯覚です.
- 現在の理解では,MAEは知覚された空間的位置に影響を与えず,視覚系における運動と位置処理の間の分離を支えていることを示唆しています.
- この解離は,視覚皮質の特化した領域の解剖学的および生理学的証拠によって支持されています.
研究 の 目的:
- 回転運動への適応が静的パターンの知覚される空間的位置に影響するかどうかを調査する.
- 運動後効果 (MAE) と知覚された方向転換の関係を調べる.
主な方法:
- 参加者は,風車パターンを用いて回転運動に適応されました.
- その後の静的な風車パターンの知覚された方向性を測定した.
- オリエンテーションシフトの期間と特徴は,MAEと比較されました.
主要な成果:
- 回転運動への適応は,静的な風車パターンの認識された方向を,幻想的な回転の方向に徐々に変化させました.
- この方向転換は,見かけの回転速度よりも遅い速度で起こりました.
- オリエンテーションシフトはMAEよりも長く持続し,MAEが実験的に無効化されると廃止されました.
結論:
- この発見は,運動と位置処理の間の厳格な分離という概念に異議を唱えている.
- 運動分析に関わるニューロンは,空間位置表現を動的に更新しているようです.
- これは,これまで考えられていたよりも,動きと空間情報を処理するためのより統合された神経機構を示唆しています.
関連する概念動画
Position and Displacement Vectors
To describe the motion of an object, one should first be able to describe its position (where it is at any particular time). More precisely, the position needs to be specified relative to a convenient frame of reference. A frame of reference is an arbitrary set of axes from which the position and motion of an object are described. Earth is often used as a frame of reference to describe the position of an object in relation to stationary objects on Earth.
Further, several important kinds of...
Further, several important kinds of...
Position and Displacement Vectors
To describe the motion of an object, one should first be able to describe its position (where it is at any particular time). More precisely, the position needs to be specified relative to a convenient frame of reference. A frame of reference is an arbitrary set of axes from which the position and motion of an object are described. Earth is often used as a frame of reference to describe the position of an object in relation to stationary objects on Earth.
Further, several important kinds of...
Further, several important kinds of...
Errors in Global Positioning System
Global Positioning System (GPS) technology has revolutionized navigation and positioning, but its accuracy is often compromised by various errors. These errors, stemming from environmental, satellite, and receiver-related factors, require careful mitigation to ensure reliable performance across applications.Atmospheric ErrorsGPS signals travel through the Earth’s ionosphere and troposphere, introducing delays which affect accuracy. The ionosphere is strongly influenced by charged particles,...
Field Application of Global Positioning System
The Global Positioning System (GPS) has become an indispensable tool in fieldwork, offering unparalleled precision and efficiency for surveying, navigation, and infrastructure development. By harnessing signals from a constellation of satellites, GPS receivers determine the location of objects with remarkable speed and accuracy, often completing calculations within a second.Advantages of Modern GPS TechnologyContemporary GPS receivers are designed to meet the practical demands of field...
Types of Global Positioning System Surveys
GPS surveying methods vary in application, accuracy, and data collection techniques, catering to diverse surveying and mapping needs. Static GPS, kinematic GPS, and real-time kinematic (RTK) surveying are widely used. Each technique offers distinct advantages.Static GPS involves placing one receiver at a known reference point and another at the target point. It collects exact positional data by observing multiple satellite ranges over an extended period, achieving centimeter-level accuracy for...
Real-World Applications of Space Curves
Modern aerospace navigation depends on the accurate prediction of motion in three-dimensional space. In defense applications, radar systems continuously track both interceptors and moving aerial targets to find whether their flight paths will result in a collision. These motions are modeled mathematically as space curves, which represent paths that change continuously with time. Each object’s position is described by a vector function that specifies its location in terms of time-dependent...


