PSYCH 2E03 Chapter Notes - Chapter 3: Mach Bands, Contrast Effect, Lateral Inhibition
12 Jun 2013
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Convergence: many neurons sending signals to one neuron. Rod and cone receptors send their signals to bipolar cells, which synapse onto ganglion cells which send the signal to the optic nerve. Receptor, bipolar, and ganglion cells transmit signals that originate in the receptors vertically trough the retina and out the back of the eye. Horizontal and amacrine cells: transmit cells horizontally across the retina. Each ganglion cell receives signals from 126 receptors. Signals from rods converge more than the signals from cones. Many of the foveal cones have private lines to ganglion cells. Rods result in better sensitivity than cones and cones result in better detail vision than rods. Why rods result in greater sensitivity than cones: Takes less light to generate a response from an individual rod. Receiving excitatory transmitter from a number of neurons increases the chances that a neuron will fire. Why do we use our cones to see details:
