PSYCO104 Lecture Notes - Lecture 17: Trichromacy, Additive Color, Lateral Geniculate Nucleus

• School: University of Alberta
• Department: Psychology
• Course: PSYCO104
• Professor: Eric Legge

Document Summary

Psych 104 lecture #17 sensation and perception pt. Visual receptors: rods and cones: retina contains 2 types of light-sensitive receptors: rods and cones. ~120 000 000 rods and ~6 000 000 cones: rods. 500x more sensitive than cones but no colour vision. Density of rods greatest just outside of fovea and decrease towards periphery of retina (none in fovea) Look slightly above or below the image so it falls where greatest amount of rods is: cones. Rods and cones translate light waves into nerve impulses using photopigments, protein molecules within rods and cones that generates nerve impulses from chemical reactions when absorbing light. More change in transmitter release means more signals to bipolar cells, ganglion cells and optic nerve. Message from 3 levels goes to visual relay station in thalamus, then to. Pilots and red lights in wwii: light adaptation: process where eyes become less sensitive to light in high illumination. Rods shut down and cones are activated.