Fractal rotation isolates mechanisms for form-dependent motion in human vision.

ABSTRACT: Here, we describe a motion stimulus in which the quality of rotation is fractal. This makes its motion unavailable to the translation-based motion analysis known to underlie much of our motion perception. In contrast, normal rotation can be extracted through the aggregation of the outputs of translational mechanisms. Neural adaptation of these translation-based motion mechanisms is thought to drive the motion after-effect, a phenomenon in which prolonged viewing of motion in one direction leads to a percept of motion in the opposite direction. We measured the motion after-effects induced in static and moving stimuli by fractal rotation. The after-effects found were an order of magnitude smaller than those elicited by normal rotation. Our findings suggest that the analysis of fractal rotati

SUBMITTER: Benton CP 

PROVIDER: S-EPMC2464696 | biostudies-literature | 2007 Jun

REPOSITORIES: biostudies-literature