PSY 368 Lecture Notes - Lecture 10: Lateral Inhibition, Mach Bands, Retina
9 Oct 2017
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Document Summary
All of our behavior, including perception, can be ultimately reduced to a complex pattern of activation w/in a population of neurons in the brain. Models of human behave should be biologically plausible: model shouldn"t require mechanisms that don"t exist in the brain, neurocomputational models, robotic models. Neurocomputation describes how neuron syst interact to produce behave: spatial interactions convergence, lateral connectivity, temporal interactions delay circuits, feedback loops. Many rod photoreceptors converge on single retinal ganglion cell. Signals from these receptors are being added or summed by the ganglion cell: the more receptors stimulated, the greater b"s resp. Without convergence: firing rate of b is indep of the number of stimulated receptors. Region of your visual fiel that a given cell sees . An electroe is inserted into a brian cell; the experimenter observes where a stim must be presented in order for the cell to fire. In general, the greater the convergence, the larger the size of9 receptive field.
