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関連する概念動画

The Retina01:32

The Retina

56.7K
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.
56.7K
Vision01:24

Vision

48.6K
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.
48.6K
Anatomy of the Eyeball01:20

Anatomy of the Eyeball

8.6K
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...
8.6K
Photoreceptors and Visual Pathways01:22

Photoreceptors and Visual Pathways

8.5K
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,...
8.5K
Depth Perception and Spatial Vision01:15

Depth Perception and Spatial Vision

2.7K
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.
2.7K
Visual System01:26

Visual System

2.3K
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...
2.3K

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関連する実験動画

Updated: May 5, 2026

Where You Cut Matters: A Dissection and Analysis Guide for the Spatial Orientation of the Mouse Retina from Ocular Landmarks
08:42

Where You Cut Matters: A Dissection and Analysis Guide for the Spatial Orientation of the Mouse Retina from Ocular Landmarks

Published on: August 4, 2018

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網膜の入力により,視覚的地形図の並べ替えが指示されます.

Jason W Triplett1, Melinda T Owens, Jena Yamada

  • 1Department of Molecular, Cell, and Developmental Biology, University of California-Santa Cruz, Santa Cruz, CA 95064, USA.

Cell
|October 7, 2009
PubMed
まとめ
この要約は機械生成です。

脳のマップは,協調された神経活動を使用して並べられます. 複製された視覚マップを持つ遺伝子組み換えマウスは,皮質からの接続が,発達活動パターンによって導かれ,これらの地図と一致することを示しています.

さらに関連する動画

Quantification of Vascular Parameters in Whole Mount Retinas of Mice with Non-Proliferative and Proliferative Retinopathies
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Quantification of Vascular Parameters in Whole Mount Retinas of Mice with Non-Proliferative and Proliferative Retinopathies

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Author Spotlight: Advancements in In Vivo and Ex Vivo Retinal Imaging for Improved Glaucoma Diagnosis and Treatment
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Author Spotlight: Advancements in In Vivo and Ex Vivo Retinal Imaging for Improved Glaucoma Diagnosis and Treatment

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関連する実験動画

Last Updated: May 5, 2026

Where You Cut Matters: A Dissection and Analysis Guide for the Spatial Orientation of the Mouse Retina from Ocular Landmarks
08:42

Where You Cut Matters: A Dissection and Analysis Guide for the Spatial Orientation of the Mouse Retina from Ocular Landmarks

Published on: August 4, 2018

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Quantification of Vascular Parameters in Whole Mount Retinas of Mice with Non-Proliferative and Proliferative Retinopathies
12:28

Quantification of Vascular Parameters in Whole Mount Retinas of Mice with Non-Proliferative and Proliferative Retinopathies

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Author Spotlight: Advancements in In Vivo and Ex Vivo Retinal Imaging for Improved Glaucoma Diagnosis and Treatment
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科学分野:

  • 神経科学は神経科学である.
  • 発達生物学 発達生物学について
  • 視覚システム研究 視覚システム研究

背景:

  • トポグラフィックマップは脳の感覚情報を表現し,隣接するニューロンは隣接する刺激に反応する.
  • 視覚系では,上部コリキュルスは,網膜と第一視野皮質 (V1) から並べられた地形投影を受けます.
  • このアラインメントのメカニズムには,軸索誘導分子または視覚空間表現に基づく網膜マッチングが含まれます.

研究 の 目的:

  • 皮質コリキュラー投影が網膜コリキュラー地図と一致するメカニズムを調査する.
  • 配列が分子梯度または活動依存のマッチングに依存するかどうかを判断する.

主な方法:

  • 複製された機能的な網膜コリキュラーマップと単一のV1マップを持つ遺伝子組み換えマウスを利用しました.
  • 投影パターンを分析するために,解剖学的な追跡技術を採用した.
  • マップアラインメントにおける発達中の自発的な神経活動の役割を観察した.

主要な成果:

  • コルティココリキュラー投影は,複製されたレチノコリキュラーマップと整列するために二分化しました.
  • この調整は,発達中の自発的な神経活動の正常なパターンに依存していた.
  • 偶発的な活動パターンが,収束するマップの並び合わせに不可欠であることを示した.

結論:

  • 脳内の収束する地形図は,一致する活動パターンを利用して,並べ替える.
  • この発見は,ニューラルマップが正確な構造的組織化をどのように達成するかについての一般的なモデルを示唆しています.
  • 機能的な脳回路の確立における発達神経活動の重要な役割を強調しています.