PSYCH 2E03 Lecture Notes - Vitamin A Deficiency, Receptive Field, Mach Bands
12 Jun 2013
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Prevented by diets containing high source of vitamin a readily treated by administering vitamin a. Each eye of a limulus has hundreds of ommatidia. Each ommatidium has a cornea, lens and single receptor the ommatitidia are quite large and can be individually illuminated the receptor-activity can be conveniently studied individually. Lateral inhibition inhibition that is transmitted laterally across a neural circuit recording the activity in a: Stimulating a + b with increased b in the vertebrate-retina lateral inhibition is caused by horizontal cells and amacrine cells. Lateral inhibition and mach band the areas adjacent to the borders between the bands appear fainter/darker. Physical intensity distribution of light across a, b, c and d regions. Perceived intensity of light across a, b, c and d regions. Brightness/colour in an area is influenced by the surround. Better perception of contrast>better spatial resolution/texture/sharpness/acuity of vision. An explanation for lateral inhibition & simultaneous contrasts thickness in the arrows indicates the magnitude of lateral inhibition.
