Psychology 1000 Chapter Notes - Chapter 5: Swiss Cheese, Retina, Ganglion

30 views2 pages

For unlimited access to Textbook Notes, a Class+ subscription is required.

Chapter 5 Visual Processing Oct 28
The Retina
Single Cell Recording
Lateral Inhibition
Next time: Perception; Scan 195-200
How do rods and cones work?
How does the visual system enhance images?
How can we explain phantom spots?
Let’s say you can barely distinguish 100 grams (test) of swiss cheese, to notice a difference in
weight, it would have to be 285 or 315.
I = 5
300 = 100
Know: Ganglion, Bipolar, Cone, Road, Horizontal, Amacrine parts
Roads & cones
Duplex Theory
120 million Rods
7 million Cones
Rods
Operate at low intensity
o Sensitive for brightness
None in center of your Fovea
o Densely packed at the side of your retina
Monochrome
o Only give us black & whit
Good at night vision
o When you’re looking at a star directly, its focused at the fovea, so it’s better to
look through peripheral
Cones
Operate at higher intensities
o “Insensitive” for brightness
Concentrated in Fovea
Full colour
o You need cones to get colour
But how do Rods & Cones work?
In the presence of light, the chemicals in them break down
Contain a chemical sensitive to light, and in the presence of light, they break down
Visual Pigments
Rods: Rhodopsin
Unlock document

This preview shows half of the first page of the document.
Unlock all 2 pages and 3 million more documents.

Already have an account? Log in

Get access

Grade+
$10 USD/m
Billed $120 USD annually
Homework Help
Class Notes
Textbook Notes
40 Verified Answers
Study Guides
1 Booster Class
Class+
$8 USD/m
Billed $96 USD annually
Homework Help
Class Notes
Textbook Notes
30 Verified Answers
Study Guides
1 Booster Class