Perception of Two-Stroke Apparent Motion and Real Motion

摘要

Motion perception is an important visual ability of human beings. We can perceive motions not only from real motion but also from apparent motion. Usually, the direction of a perceived apparent motion reflects the real spatial shift between the two successional images, but sometimes the perceived direction is distorted. Two-stroke apparent motion is one of such phenomena, which is induced by two pattern frames from a motion sequence and a blank ISI. We studied on two-stroke apparent motion and found that there were temporal limits to its perception. We measured the brain activity using fMRI when subjects observing the two-stroke apparent motion, real motion and still images. Our fMRI experimental results show that MT/V5 is activated for both the apparent motion and real motion perception, but more activities in the prefrontal/frontal and parietal cortex are observed for the apparent motion perception.