PS102 Lecture 14: Lecture 14
Document Summary
Light rods and cones neural signals bipolar cells ganglion cells optic nerve optic chiasm opposite half of brain. Optic chiasm the point at which the optic nerves project into the brain. Main pathway lateral geniculate nucleus (thalamus) primary visual cortex (occipital lobe) Second pathway superior colliculus thalamus primary visual cortex. Perceive small part of electromagnetic (em) spectrum. Light waves measured in nanometers (billionths of meter: from 700 nm to 400. Red green colour blind individuals should not be able to perceive yellow (red + green = yellow) Stare at red look away you"ll see green (same for blue and yellow) Have rebound effect with receptor responding with its opponent opposite reaction. Dual process theory: combines trichromatic and opponent process theories. Combines trichromatic and opponent process theories. 3 types of cones sensitive to short (blue), medium (green) and long(red) wavelengths. These cones stimulate opponent process reactions.
