Whichever possible motion direction is the same in all apertures is the true global motion direction of the object. B. How is motion computed? Building a global-motion detector C. Visual area MT C. Visual area MT •demo
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5/22/2013 6 C. Visual area MT: Determining Direction of Fields of Moving Dots •Increasing motion coherence increases firing of MT neurons and accuracy of judgment of motion direction. C. Visual area MT: Microstimulating in MT •Do MT neurons really determine perception? •Microstimulate direction selective cells while monkey watches moving dots in one direction. •Monkey shifted decision towards artificially stimulated direction C. Visual area MT: Motion Aftereffect Demo C. Visual area MT: Motion Aftereffect MT sensitive to both motion and the motion aftereffect; Activation in MT/V5, but not V1 reflects perception of motion