PSYCH 1XX3 Lecture Notes - Teddy Bear, Critical Period, Prosopagnosia
Document Summary
Brain uses a division of labor, with each region along visual pathway processing relatively specific info, then passing it on; form recognition follows similar pattern. They transduce the light stimulus into a neural impulse. Magno: found mainly in periphery of retina: used mainly for brightness change detection, motion, depth. Parvo: used mainly for color, pattern, form detection found throughout retina. Axons of ganglion cells: retina -> optic nerve -> lgn -> primary visual cortex (occipital lobe) Cells in the primary visual cortex are very particular about what makes them fire; these cells are called feature detectors . 1952: hodgkin and huxley recorded electrical activity in an individual squid neuron. Technique used from then to see how individual neurons respond to specific stimuli. 1959: discovered neuron in optic nerve of frog that responded only to moving black dots -> bug receptors . Extended their work in their studies of cells in the visual cortex of cats and monkeys.
