| The vertical-horizontal illusion in hemi-spatial neglect. | |
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MedLine Citation:
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PMID: 20624409 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The vertical-horizontal illusion is a robust phenomenon of length mis-estimation between two orthogonal lines. This illusion involves an anisotropy component that makes the vertical line appear longer than the horizontal one and a bisection component that makes the bisected line shorter than the bisecting one. Six patients presenting a moderate left hemi-neglect (N-patients) were compared to four right brain damaged patients without neglect (RH-patients) and with control participants in the perception of various spatial configurations of the vertical-horizontal illusion. Relative to controls, we found that both components of the illusion increased in patients: the anisotropy component rose from 5 to 11% and 10% (for N- and RH-patients, respectively) and the bisection component from 17 to 22% and 20% (for N- and RH-patients, respectively). In addition, we found that an horizontal-'T' figure oriented to the left produced much less bias than the same figure oriented to the right. These results are discussed in light of explanations based on attentional disengagement from an image junction and strength of the representation of objects extending over the neglected side. |
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Authors:
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M de Montalembert; P Mamassian |
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Publication Detail:
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Type: Journal Article Date: 2010-07-17 |
Journal Detail:
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Title: Neuropsychologia Volume: 48 ISSN: 1873-3514 ISO Abbreviation: Neuropsychologia Publication Date: 2010 Sep |
Date Detail:
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Created Date: 2010-08-23 Completed Date: 2010-12-08 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0020713 Medline TA: Neuropsychologia Country: England |
Other Details:
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Languages: eng Pagination: 3245-51 Citation Subset: IM |
Copyright Information:
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Copyright 2010 Elsevier Ltd. All rights reserved. |
Affiliation:
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Laboratoire Psychologie de la Perception (CNRS UMR 8158), Université Paris Descartes, Paris, France. marie.de-montalembert@parisdescartes.fr |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Aged Anisotropy Female Functional Laterality / physiology Humans Male Middle Aged Neuropsychological Tests Optical Illusions / physiology* Perceptual Disorders / psychology* Photic Stimulation Stroke / complications, psychology Visual Perception / physiology* |
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