PS262 Study Guide - Final Guide: Grandmother Cell, Spatial Frequency, Mach Bands
Document Summary
Lateral inhibition: inhibition transmitted across the retinal, decrease in the ring of receptors, horizontal and amacrine cells transmit signals across human retina, capacity of an excited neuron to reduce activity of its neighbours. Mach bands: illusory light and dark bands near a light-dark border. Principle of belongingness: an areas appearance is in uenced by the part of the surroundings to which the area appears to belong. Receptive eld: the area that causes the neuron to re. Centre-surround organization: area in the centre of the rf responds differently to area in the surround. Centre-surround antagonism: when a spot of light becomes large enough that it begins to cover the inhibitory area, stimulation of the inhibitory surround counteracts the centres excitatory response, decreases neurons ring rate. Receptive eld is always on the retina. Signals leave the eye via optic nerve, and travel from lgn to occipital lobe in the cerebral.