関連する実験動画

Updated: Aug 12, 2026

Using the Horseshoe Crab, Limulus Polyphemus, in Vision Research
14:28

Using the Horseshoe Crab, Limulus Polyphemus, in Vision Research

Published on: July 3, 2009

定常状態の網膜照明に対する瞳孔の反応:円による貢献

J ten Doesschate, M Alpern

    Science (New York, N.Y.)
    |August 27, 1965
    PubMed
    まとめ

    光に対する瞳孔の反応は,棒細胞のない個体で測定されました. 棒がなくても,高い光の強さが強い瞳孔の反応を誘発し,既存の理論に挑戦しました.

    さらに関連する動画

    Preparation of Living Isolated Vertebrate Photoreceptor Cells for Fluorescence Imaging11:24

    Preparation of Living Isolated Vertebrate Photoreceptor Cells for Fluorescence Imaging

    Published on: June 22, 2011

    Imaging Ca2+ Dynamics in Cone Photoreceptor Axon Terminals of the Mouse Retina09:05

    Imaging Ca2+ Dynamics in Cone Photoreceptor Axon Terminals of the Mouse Retina

    Published on: May 6, 2015

    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.
    G-Protein Gated Ion Channels01:21

    G-Protein Gated Ion Channels

    GPCRs are primarily responsible for our sense of smell, taste, and vision.  The binding of a sensory stimulus activates GPCR to stimulate effector proteins, many of which are ion channels in the sensory organs. GPCRs modulate the opening and closing of the target ion channels either directly by binding them, or by releasing second messengers that activate these channels. As ions move across the membrane, the membrane potential is altered, which induces an appropriate response.
    Sensory organs,...
    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,...
    Focusing of Light in the Eye01:16

    Focusing of Light in the Eye

    Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...
    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...