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

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

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

Christopher P Benton,Justin M D O'Brien,W Curran,Christopher P Benton,Justin M D O'Brien,W Curran,

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 rotation involves different neural processes than those for standard translational motion. Given that the percept of motion elicited by fractal rotation is a clear example of motion derived from form analysis, we propose that the extraction of fractal rotation may reflect the operation of a general mechanism for inferring motion from changes in form.

Fractal rotation isolates mechanisms for form-dependent motion in human vision. Publishing Authors By Initials

CP Benton,JM O'Brien,W Curran,CP Benton,JM O'Brien,W Curran,

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

PUBLICATION TYPE: Journal Article

Journal: Biology letters

VOLUME: 3

Page Numbers: 306-8

Journal Abbreviation: Biol. Lett.

ISSN: 1744-9561

DAY: 22

MONTH: Jun

YEAR: 2007

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

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LANGUAGE: eng

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Grant and Affiliation Information for Fractal rotation isolates mechanisms for form-dependent motion in human vision.

AFFILIATION: Department of Experimental Psychology, University of Bristol, 12a Priory Road, Bristol BS8 1TU, UK. chris.benton@bristol.ac.uk

Country: England

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MEDLINETA: Biol Lett

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