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関連する概念動画

Perceptual Constancy01:12

Perceptual Constancy

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Perceptual constancy is the ability to recognize that objects remain consistent and unchanged even when their appearance varies due to changes in sensory input. There are four main types of perceptual constancy: size constancy, shape constancy, color constancy, and brightness constancy.
Size constancy is the recognition that an object remains the same size, even when its image on the retina changes. For instance, a bus is perceived to be large enough to carry people, even if it looks tiny from...
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Relative Motion Analysis using Rotating Axes-Problem Solving01:29

Relative Motion Analysis using Rotating Axes-Problem Solving

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Consider a crane whose telescopic boom rotates with an angular velocity of 0.04 rad/s and angular acceleration of 0.02 rad/s2. Along with the rotation, the boom also extends linearly with a uniform speed of 5 m/s. The extension of the boom is measured at point D, which is measured with respect to the fixed point C on the other end of the boom. For the given instant, the distance between points C and D is 60 meters.
Here, in order to determine the magnitude of velocity and acceleration for point...
704
Relative Motion Analysis using Rotating Axes01:25

Relative Motion Analysis using Rotating Axes

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Consider a component AB undergoing a linear motion. Along with a linear motion, point B also rotates around point A. To comprehend this complex movement, position vectors for both points A and B are established using a stationary reference frame.
However, to express the relative position of point B relative to point A, an additional frame of reference, denoted as x'y', is necessary. This additional frame not only translates but also rotates relative to the fixed frame, making it...
880
Depth Perception and Spatial Vision01:15

Depth Perception and Spatial Vision

1.8K
Depth perception is the ability to perceive objects three-dimensionally. It relies on two types of cues: binocular and monocular. Binocular cues depend on the combination of images from both eyes and how the eyes work together. Since the eyes are in slightly different positions, each eye captures a slightly different image. This disparity between images, known as binocular disparity, helps the brain interpret depth. When the brain compares these images, it determines the distance to an object.
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Relative Motion Analysis - Velocity01:24

Relative Motion Analysis - Velocity

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A stroke engine has a slider-crank mechanism that converts rotational motion from the crank into linear motion of the slider or vice versa. This mechanism consists of three main parts: the crank, the connecting rod, and the slider.
When an external force is exerted, it sets the crank into a rotational movement. This, in turn, instigates the motion of the connecting rod, leading to what is referred to as a general plane motion. This process involves two key points - point A on the connecting rod...
700
Relative Motion Analysis using Rotating Axes - Acceleration01:22

Relative Motion Analysis using Rotating Axes - Acceleration

754
Consider a component AB undergoing a linear motion. Along with a linear motion, point B also rotates around point A. To comprehend this complex movement, position vectors for both points A and B are established using a stationary reference frame. The absolute velocity of point B is determined by adding the absolute velocity of point A, the relative velocity of point B in the rotating frame, and the effects caused by the angular velocity within the rotating frame.
Time differentiation is...
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関連する実験動画

Updated: Jan 17, 2026

Development of a Gaze-Contingent Display Framework Designed for Perceptual and Oculomotor Research with Simulated Central Vision Loss
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Development of a Gaze-Contingent Display Framework Designed for Perceptual and Oculomotor Research with Simulated Central Vision Loss

Published on: April 11, 2025

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視線ドリフト中の運動知覚における不連続性

Josephine C D'Angelo1,2, Pavan Tiruveedhula1,3, Raymond J Weber4,5

  • 1Herbert Wertheim School of Optometry and Vision Science, University of California, Berkeley, Berkeley, CA, USA.

Journal of vision
|January 14, 2026
PubMed
まとめ
この要約は機械生成です。

人間の視覚システムは、眼球ドリフト中に運動を知覚する方法が異なる。網膜滑りに沿った刺激は安定して見えるが、それに逆らう刺激は、特に遠い背景では、動いているように見える。

キーワード:
運動知覚網膜滑り視覚安定性眼球運動知覚

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Assessing Binocular Central Visual Field and Binocular Eye Movements in a Dichoptic Viewing Condition
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科学分野:

  • 神経科学;視覚科学;知覚

背景:

  • 人間の視覚システムは、通常、絶え間ない眼球運動にもかかわらず、安定した知覚を維持する。;しかし、固視ドリフト中には、網膜滑りに沿って動く視覚刺激は、たとえ増幅されていても、知覚できなくなる可能性がある。;この現象は、自然な眼球運動中の運動知覚を支えるメカニズムについての疑問を提起する。

研究 の 目的:

  • 網膜滑りに沿って動く刺激が、たとえ低減された大きさであっても、安定して知覚されるかどうかを調査すること。;眼球ドリフト中の運動知覚に対する背景文脈の影響を探ること。

主な方法:

  • 刺激を提示するために適応型光学走査型網膜光像計を使用した。;刺激の動きは、測定された網膜運動に依存した。;被験者は、さまざまな背景条件（世界固定、近接、遠方）下での知覚運動を報告した。

主要な成果:

  • 運動知覚における明確な閾値が観察された。;網膜滑りの方向に動く刺激は、その大きさに関係なく、ほとんどまたは全く運動がないと知覚された。;眼球運動と反対方向に動く刺激は、動いていると知覚された。;この効果は、背景の内容が4°を超えてずれた場合に著しく減少した。

結論:

  • 固視ドリフト中の運動知覚は、刺激の動きと網膜滑りの関係に非常に敏感である。;物体の知覚される安定性は、網膜に対するその動きと、文脈的背景要素の存在によって影響される。;背景要素の空間的分離は、この視覚現象の変調において重要な役割を果たす。