This is also termed " apparent motion" and is the basis of movies and television. The first, demonstrated in the figure to the right is " Beta movement", often used in billboard displays, in which an object is perceived as moving when, in fact, a series of stationary images is being presented. Two or more stimuli that are switched on and off in alternation can produce two different motion percepts. First-order motion perception Įxample of Beta movement, often confused with phi phenomenon, in which a succession of still images gives the illusion of a moving ball. Neuropsychological studies of a patient who could not see motion, seeing the world in a series of static "frames" instead, suggested that visual area V5 in humans is homologous to motion processing area V5/MT in primates. The inability to perceive motion is called akinetopsia and it may be caused by a lesion to cortical area V5 in the extrastriate cortex. visual perception), neurology, neurophysiology, engineering, and computer science. Motion perception is studied by many disciplines, including psychology (i.e. Although this process appears straightforward to most observers, it has proven to be a difficult problem from a computational perspective, and difficult to explain in terms of neural processing. Motion perception is the process of inferring the speed and direction of elements in a scene based on visual, vestibular and proprioceptive inputs. ![]() The dorsal stream is responsible for detection of location and motion. They originate from a common source in visual cortex. The dorsal stream (green) and ventral stream (purple) are shown.
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