PSY 252 Chapter Notes - Chapter 3: Simple Cell, Far-Sightedness, Refractive Error
Document Summary
Single neuron readings: the behaviour of individual neurons in known sensory pathways or brain regions is recorded. In some cases, each spike of a neuron will be converted to sounds like a click. Regional brain function: studying the larger brain regions and neural systems. Iris: the coloured membrane; controls amount of light coming in: pupil: light enters here; contracts and dilates depending on the brightness/dimness and on emotional factors. The fovea: when looking directly at an object, the eyes rotate so the image falls on the fovea, only cones, no rods, the foveal cones have a different shape than the peripheral cones. Lack of vitamin a can lead to night blindness. Iodopsin: pigment in the cone; visual purple ; breaks down into several chemical components. Neural responses to light: blind spot: the area where bundles of axons and blood vessels exit through the retina; there are no photoreceptors in this area.
