PSYC 3312 Lecture Notes - Lecture 3: Mach Bands, Receptive Field, Lateral Geniculate Nucleus

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1. the illusion that they are different, which is created by the differences in the areas surrounding each square, is the simultaneous contrast effect. 2. the light area surrounding the square on the left causes receptors under that area to respond rapidly and to send large amounts of inhibition to the neurons below the center square. 2: hartline illuminated different areas of the retina and found that the fiber he was recording from responded only when a small area of the retina was illuminated. He called the area that caused the neuron to fire the nerve fiber"s receptive field: this region of the retina that must receive illumination in order to obtain a response in any given fiber. Stimulation of the inhibitory surround counteracts the center"s excitatory response, causing a decrease in the neuron"s firing rate. In the side they cannot see, they are able to detect motion, but see no depth, color, size, shape, etc.

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