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dc:title "HTML Summary of #2831 \n\nVisuo-vestibular interaction in the reconstruction of travelled trajectories\n\n";
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bibo:abstract "We recently published a study of the reconstruction of passively travelled trajectories from optic flow. Perception was prone to illusions in a number of conditions, and not always veridical in the others. Part of the illusionary reconstructed trajectories could be explained by assuming that subjects base their reconstruction on the ego-motion percept built during the stimulus' initial moments\n. In the current paper, we test this hypothesis using a novel paradigm: if the final reconstruction is governed by the initial percept, providing additional, extra-retinal information that modifies the initial percept should predictably alter the final reconstruction. The extra-retinal stimulus was tuned to supplement the information that was under-represented or ambiguous in the optic flow: the subjects were physically displaced or rotated at the onset of the visual stimulus. A highly asymmetric velocity profile (high acceleration, very low deceleration) was used. Subjects were required to guide an input device (in the form of a model vehicle; we measured position and orientation) along the perceived trajectory. We show for the first time that a vestibular stimulus of short duration can influence the perception of a much longer lasting visual stimulus. Perception of the ego-motion translation component in the visual stimulus was improved by a linear physical displacement: perception of the ego-motion rotation component by a physical rotation. This led to a more veridical reconstruction in some conditions, but to a less veridical reconstruction in other conditions."^^xsd:string;
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dct:date "2002-12";
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skos:prefLabel "Behavioral Neuroscience" .
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skos:prefLabel "Neuropsychology" .
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foaf:familyName "Bertin"^^xsd:string;
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foaf:familyName "Berthoz"^^xsd:string;
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foaf:name "A. Berthoz"^^xsd:string;
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