PSYB51H3 Chapter Notes - Chapter 8: Akinetopsia, Magnocellular Cell, Smooth Pursuit
Document Summary
Motion aftereffect (mae): the illusion of motion of a stationary object that occurs after prolonged exposure to a moving object. After viewing motion in a constant direction for a sustained period of time (at least 15 seconds or so), we see stationary objects that we view subsequently as moving the opposite direction. Just as colour aftereffects are caused by opponent processes for colour vision, maes are caused by opponent processes for motion detection. You might think that it is sensible to have two neurons (a and b) separated by a fixed distance. A bug moving from left to right would first pass through neuron a"s receptive field, and then shortly thereafter through neuron b"s receptive field. A third cell would detect this movement: however, the bug can be large enough to be in both neurons" receptive fields, to solve this problem, we need two additional components in our neural circuit.
