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関連する概念動画

The Retina01:32

The Retina

The retina is a layer of nervous tissue at the back of the eye that transduces light into neural signals. This process, called phototransduction, is carried out by rod and cone photoreceptor cells in the back of the retina.
Vision01:24

Vision

Vision is the result of light being detected and transduced into neural signals by the retina of the eye. This information is then further analyzed and interpreted by the brain. First, light enters the front of the eye and is focused by the cornea and lens onto the retina—a thin sheet of neural tissue lining the back of the eye. Because of refraction through the convex lens of the eye, images are projected onto the retina upside-down and reversed.
Anatomy of the Eyeball01:20

Anatomy of the Eyeball

The eye is a spherical, hollow structure composed of three tissue layers. The outer layer — the fibrous tunic, comprises the sclera — a white structure — and the cornea, which is transparent. The sclera encompasses some of the ocular surface, most of which is not visible. However, the 'white of the eye' is distinctively visible in humans compared to other species. The cornea, a clear covering at the front of the eye, enables light penetration. The eye's middle layer, the vascular tunic,...
Photoreceptors and Visual Pathways01:22

Photoreceptors and Visual Pathways

At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category, whereas...
Visual System01:26

Visual System

Light enters the eye through the cornea, a transparent, dome-shaped surface covering the surface of the eyeball that helps to direct and focus incoming light. This light is then channeled toward the pupil, an adjustable opening whose size is controlled by the iris. The iris, a pigmented muscle, regulates the amount of light entering the eye by contracting or dilating the pupil, thereby ensuring optimal light levels for clear vision.
Once through the pupil, the light passes through the lens, a...
Color Vision01:24

Color Vision

Color perception begins in the retina, the light-sensitive layer at the back of the eye. Two main theories explain how colors are seen: the trichromatic theory and the opponent-process theory. The trichromatic theory, proposed by Thomas Young in 1802 and extended by Hermann von Helmholtz in 1852, suggests that color vision is based on three types of cone receptors in the retina. These cones are sensitive to different but overlapping ranges of wavelengths corresponding to red, blue, and green.

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VisualEyes: A Modular Software System for Oculomotor Experimentation
10:41

VisualEyes: A Modular Software System for Oculomotor Experimentation

Published on: March 25, 2011

柔軟なレチノトピー:視覚皮質における運動依存の位置コーディング.

David Whitney1, Herbert C Goltz, Christopher G Thomas

  • 1Department of Psychology, University of Western Ontario, London, Ontario N6A 5C2, Canada. dvw@uwo.ca

Science (New York, N.Y.)
|September 23, 2003
PubMed
まとめ
この要約は機械生成です。

視覚的動きは,脳が主視野皮質で物体の位置を表す位置を変化させます. この皮質のシフトは,知覚された運動の反対方向に発生し,神経表現と主観的な経験の間の解離を示しています.

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Visualization of Endosome Dynamics in Living Nerve Terminals with Four-dimensional Fluorescence Imaging
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Visualization of Endosome Dynamics in Living Nerve Terminals with Four-dimensional Fluorescence Imaging

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Fabrication of Flexible Image Sensor Based on Lateral NIPIN Phototransistors
09:59

Fabrication of Flexible Image Sensor Based on Lateral NIPIN Phototransistors

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関連する実験動画

Last Updated: Jul 1, 2026

VisualEyes: A Modular Software System for Oculomotor Experimentation
10:41

VisualEyes: A Modular Software System for Oculomotor Experimentation

Published on: March 25, 2011

Visualization of Endosome Dynamics in Living Nerve Terminals with Four-dimensional Fluorescence Imaging
10:51

Visualization of Endosome Dynamics in Living Nerve Terminals with Four-dimensional Fluorescence Imaging

Published on: April 16, 2014

Fabrication of Flexible Image Sensor Based on Lateral NIPIN Phototransistors
09:59

Fabrication of Flexible Image Sensor Based on Lateral NIPIN Phototransistors

Published on: June 23, 2018

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
  • コグニティブ・サイエンス コグニティブ・サイエンス

背景:

  • 視覚野はレチノトピカルに編成されており,視覚野の隣接する領域は,視覚野の隣接する領域によって処理されます.
  • この precise cortical mapping of spaceが個人の主観的な位置認識と一致するかどうかは不明である.
  • この関係を理解することは,視覚処理と潜在的な障害を理解するために非常に重要です.

研究 の 目的:

  • 視野皮質における静止している物体の網膜の表象が,その知覚された位置を正確に反映しているかどうかを調査する.
  • 視覚運動が空間位置の皮質表現に影響するかどうかを判断する.
  • 神経位置表現と知覚された場所の間の解離を探求する.

主な方法:

  • 機能的磁気共鳴画像 (fMRI) を活用して,視覚野の皮質における脳活動を測定しました.
  • 視覚的な動きを特徴とするシーンの中で静止している物体を参加者に提示しました.
  • 変化する運動刺激に反応するオブジェクトの位置のレチノトピック表現を分析した.

主要な成果:

  • 静止しているオブジェクトのレチノトピック表現の体系的なシフトは,視覚的な動きが存在するときに観察されました.
  • オブジェクトの皮質表現は,視覚運動の知覚方向と反対の方向にシフトした.
  • これは,脳の空間位置のマッピングが,知覚された位置とは無関係に変化することが可能であることを示しています.

結論:

  • fMRIで測定された,主視野皮質の位置の網膜学的な表現は,知覚された位置から分離することができます.
  • 視覚運動は,空間位置のニューラル表現に積極的に影響し,変化させます.
  • これらの発見は,皮質の網膜学と主観的な視覚経験の間の直接的な対応の仮定に異議を唱える.