Presentation is loading. Please wait.

Presentation is loading. Please wait.

Color vision. Outlines What is color Retinal circuitry for color vision Several ways to label retinal cells.

Published byLillian McKenzie Modified over 9 years ago

Similar presentations

Presentation on theme: "Color vision. Outlines What is color Retinal circuitry for color vision Several ways to label retinal cells."— Presentation transcript:

1 Color vision

2

3 Outlines What is color Retinal circuitry for color vision Several ways to label retinal cells

4 Color history: discovery of color Isaac Newton

5 Color history: discovery of color

6 Reflection makes colors

7 Retina anatomy of human being Outer nuclear layer Inner nuclear layer Ganglion cell layer Outer plexiform layer Inner plexiform layer

8 Cone mosaic in human retina L-coneM-coneS-cone L-cone or M-cone Immunohist- ochemistry (IHC) S-cone

9 Immunohist -ochemistry (IHC)

10 Trichromats vs Dichromats

11 Strategy to see color Principle of Univariance: any single photopigment is “colour blind”. Given proper combination of wavelength and intensity, and can trigger same response in M-cone. Color-coding ganglion cells receive antagonistic input from cones: red-green; yellow-blue

12 Color opponency mechanism Red-green opponent cells: midget ganglion cells Blue-yellow opponent cells: small bistratified ganglion cells Review by Dacey, 2000 1111

13 Dichromats Review of Masland, 2012

14 S/M opponent ganglion cells in retina of guinea pig a dichromatic mammal Dye iontophoresis

15 To dye fill a cell: A.visualize the cell via quick and rough nucleus staining B.A microelectrode filled with fluorescent dye is placed carefully in contact with the soma C.Break into the cell and apply current. “injecting fluorescent dye into the cell electronically”. D.How big is 10μm? The width (diameter) of a human hair ranges from 0.017 to 0.181 mm. Dye iontophoresis What is?

16 Movie showing iontophoresis of dye into retinal ganglion cell

17 Summary of cell labeling techniques 1.Immunocytochemistry 2.Dye-filling 3. Genetic tags: GFP, YFP…

18 History of genetic tag: GFP 2008 Nobel prize winners Osamu Shimomura, Martin Chalfie, and Roger Tsien,

19 Genetic tags: YFP Transgenic lines that mark RGC subtypes

20 “Most of my knowledge came from self-study,” says Dr. Shimomura. “If you find an interesting subject, study it through to the finish. If you confront difficulties, overcome them. Don’t be discouraged. There are always difficulties in research.” The End

Download ppt "Color vision. Outlines What is color Retinal circuitry for color vision Several ways to label retinal cells."

Similar presentations

The Visual System: Color Vision Lesson 18. The Trichromatic Theory n Young-Helmholtz (1802) n 3 types of color receptors l Cones n Differential sensitivity.

The Visual System: Color Vision Lesson 18. The Trichromatic Theory n Young-Helmholtz (1802) n 3 types of color receptors l Cones n Differential sensitivity.
Box 6.3 Evolutionary Psychology Fig 6.17 Bowerbird Nests.

Box 6.3 Evolutionary Psychology Fig 6.17 Bowerbird Nests.
Color Vision. Wavelength properties: ● Hue: psychological reaction to different wavelengths of light. (Basically the same thing as color). ● Different.

Color Vision. Wavelength properties: ● Hue: psychological reaction to different wavelengths of light. (Basically the same thing as color). ● Different.
Color Harmony and the Opponent-Process Channel Theory Christina Lewis Psych 159.

Color Harmony and the Opponent-Process Channel Theory Christina Lewis Psych 159.
Color.

Color.
1 Computational Vision CSCI 363, Fall 2012 Lecture 33 Color.

1 Computational Vision CSCI 363, Fall 2012 Lecture 33 Color.
Color Vision Our visual system interprets differences in the wavelength of light as color Rods are color blind, but with the cones we can see different.

Color Vision Our visual system interprets differences in the wavelength of light as color Rods are color blind, but with the cones we can see different.
2002/02/05PSYC202-005, Term 2, Copyright Jason Harrison, 20021 Psychophysics of colour perception Neurophysiology, psychophysics, and magic (or you only.

2002/02/05PSYC , Term 2, Copyright Jason Harrison, Psychophysics of colour perception Neurophysiology, psychophysics, and magic (or you only.
Special Senses. Retina A B C D E F G H I A: Inner limiting membrane. B: Optic nerve fiber layer. C: Ganglionic cell layer. D: Inner plexiform. E: Inner.

Special Senses. Retina A B C D E F G H I A: Inner limiting membrane. B: Optic nerve fiber layer. C: Ganglionic cell layer. D: Inner plexiform. E: Inner.
Ch 71 Sensation & Perception Ch. 7: Perceiving Color © Takashi Yamauchi (Dept. of Psychology, Texas A&M University) Main topics Trichromatic theory Opponent.

Ch 71 Sensation & Perception Ch. 7: Perceiving Color © Takashi Yamauchi (Dept. of Psychology, Texas A&M University) Main topics Trichromatic theory Opponent.
Color perception Color is a sensation („The rays are not coloured“) Three types of cone photoreceptors transduce light into electrical signals These signals.

Color perception Color is a sensation („The rays are not coloured“) Three types of cone photoreceptors transduce light into electrical signals These signals.
Evaluation of colour-correcting lenses Vien Cheung Research Fellow in Colour and Imaging Science CREATE 2010.

Evaluation of colour-correcting lenses Vien Cheung Research Fellow in Colour and Imaging Science CREATE 2010.
COGNITIVE SCIENCE 17 The Visual System: Color Vision Part 2 Jaime A. Pineda, Ph.D.

COGNITIVE SCIENCE 17 The Visual System: Color Vision Part 2 Jaime A. Pineda, Ph.D.
The Human Eye and Vision 2 (Processing The Image)

The Human Eye and Vision 2 (Processing The Image)
COLOR PERCEPTION Physical and Psychological Properties Theories – Trichromatic Theory – Opponent Process Theory Color Deficiencies Color and Lightness.

COLOR PERCEPTION Physical and Psychological Properties Theories – Trichromatic Theory – Opponent Process Theory Color Deficiencies Color and Lightness.
Seeing Color. Visual Spectrum Light varies in intensity and wavelength.

Seeing Color. Visual Spectrum Light varies in intensity and wavelength.
THEORIES OF COLOR VISION

THEORIES OF COLOR VISION
Colour Vision I The retinal basis of colour vision and the inherited colour vision deficiencies Prof. Kathy T. Mullen McGill Vision Research (H4.14) Dept.

Colour Vision I The retinal basis of colour vision and the inherited colour vision deficiencies Prof. Kathy T. Mullen McGill Vision Research (H4.14) Dept.
Sensation and Perception Part 1: Intro and Vision.

Sensation and Perception Part 1: Intro and Vision.
Transduction Conversion of one form of energy to another. How is this important when studying sensation? Stimulus energies to neural impulses. For example:

Transduction Conversion of one form of energy to another. How is this important when studying sensation? Stimulus energies to neural impulses. For example:

Similar presentations

Ads by Google