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Lookup NU author(s): Professor Marcus Kaiser
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Saccadic eye movements transiently distort perceptual space. Visual objects flashed shortly before or during a saccade are mislocalized along the saccade direction, resembling a compression of space around the saccade target. These mislocalizations reflect transient errors of processes that construct spatial stability across eye movements. They may arise from errors of reference signals associated with saccade direction and amplitude or from visual or visuomotor remapping processes focused on the saccade targets position. The second case would predict apparent position shifts toward the target also in directions orthogonal to the saccade. We report that such orthogonal mislocalization indeed occurs. Surprisingly, however, the orthogonal mislocalization is restricted to only part of the visual field. This part comprises distant positions in saccade direction but does not depend on the targets position. Our findings can be explained by a combination of directional and positional reference signals that varies in time course across the visual field.
Author(s): Kaiser M, Lappe M
Publication type: Article
Publication status: Published
Journal: Neuron
Year: 2004
Volume: 41
Issue: 2
Pages: 293-300
ISSN (print): 0896-6273
ISSN (electronic): 1097-4199
Publisher: Cell Press
URL: http://dx.doi.org/10.1016/S0896-6273(03)00849-3
DOI: 10.1016/S0896-6273(03)00849-3
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