6.1 Visual Coding and the Retinal Receptors Flashcards Preview

Behavioral Neuroscience > 6.1 Visual Coding and the Retinal Receptors > Flashcards

Flashcards in 6.1 Visual Coding and the Retinal Receptors Deck (10):
1

Transduction

The conversion of that physical energy to an electrochemical pattern in the neurons

2

Coding

The one-to-one correspondence between some aspects of the physical stimulus and some aspect of the nervous system activity

3

Receptor potential

A local depolarization or hyperpolarization of a receptor membrane

4

Law of specific nerve energies

Described by Johannes Müller 1838; whatever excited established a special kind of energy that nerve; any activity by particular always conveys the same kind of information to the brain

5

Macula

The portion of your retina with the greatest ability to resolve detail; at the center of the retina; includes the fovea

6

Photopigments

Chemicals that release energy when struck by light

7

Trichromatic theory

Also known as Young-Helmholtz theory; we perceive color through the relative rates of response by three kinds of cones, each kind maximally sensitive to different set of wavelengths

8

Opponent-process theory

We perceive color in terms of paired opposite: red versus green, yellow versus blue, and white versus black; Employed by bipolar cells that become excitatory or inhibitory

9

Color constancy

The ability to recognize the color of an object despite changes in light; Requires a comparison

10

Reception

The absorption of physical energy by the receptors