PSYCH 240 Lecture Notes - Receptive Field, Edge Detection, Dendrite
Document Summary
Lecture notes 1/16/2014: common to all sensory/perceptual systems, transduction: from physical to neural. Get from something in the environment to action potentials. Senses must convert physical stimulus energy into electrical changes in nerve receptor cells: visual receptor cells: rods and cones, they respond to certain wavelengths of lights, neural coding. Code for things like pitch or loudness, color or brightness. Interactivity across time: what we perceive right now vs. past or future. Interactivity across space: perception is affected by what"s around it: visual context. Most of this coding takes place post-receptor. Neurons fire action potential: rate of firing, number of neurons firing, which neurons are firing, interactivity. In time: color adaptation: affected by what comes before it and sometimes immediately after it. In space: contrast effects: structure of the visual system, overview primary visual pathway. Two visual pathways: what vs. where : dorsal stream the where, ventral stream the what, distal stimulus.
