PSYB51H3 Study Guide - Motion Aftereffect, Receptive Field, Lateral Geniculate Nucleus
Document Summary
Chapter 8: motion perception: our visual system distinguishes the bug by a number of features, such as its shape, its location in space, and its color. Just as colour aftereffects are caused by opponent processes for colour vision, Maes are caused by opponent processes for motion detection. Computation of visual motion: because motion involves a change in position over time, a logical place to start is with two adjacent receptors (call them neurons a and b) separated by fixed distance. A bug (or a spot of light) moving from left to right would first pass through neuron a"s receptive field, and then a short time later it would enter neuron b"s receptive field. In theory, a third cell that listens to neurons a and b should be able to detect this movement: however, out motion detection cell (call it m) cannot simply add up excitatory inputs from a and b.
