Psych U1 - theories (eye, ear, sleep)

Trichromatic theory

all colors in spectrum are produced by combining red, green, & blue because the cones in the retina are responsive to those three wavelengths

opponent-process theory

color is coded in opponent pairs this leads to the experience of negative afterimages when the signal moves past the retina on its way to the brain

Place theory

Different portions of the basilar membrane are sensitive to sounds of different frequencies. Works past 4000 Hz.

Volley Theory

Works with Frequency Theory to separate sound waves into different action potentials fired in quick succession because neurons can’t fire as fast as needed for the highest frequencies.

Frequency Theory

The rate of nerve impulses matches the frequency of a tone allowing us to sense pitch. Works up to 4000 Hz

Activation Synthesis Theory

dreams are the product of our brain making sense of random neural firing

Consolidation of memory

REM sleep is essential for the consolidation of memories when they are transferred from short term to long term

Restoration Theory

sleep allows for development (physical growth), muscle restoration, the building and strengthening of neural connections during REM3 (deep sleep).