| How long is a piece of string? A study of line bisection in a case of visual neglect. | |
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MedLine Citation:
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PMID: 3416614 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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We report a case of severe left visual neglect consequent upon extensive infarction in the territory of the right middle cerebral artery. A detailed analysis is given of the patient's performance on line bisection. The stimuli cover a wider range of lengths than is usually employed in such studies (11'' to 1''). The magnitude of the patient's rightward displacement of his transections is linearly related to the length of the stimulus line, such that the longer the line, the greater the left 'neglect'. At line length 2'', the patient's transections are relatively accurate, and at length 1'', the transections cross the objective midpoint to give a reliable left displacement (= 'right neglect'). On some occasions, these latter transections are placed beyond the leftmost point of the stimulus line. We interpret the data in terms of two constructs: (a) an 'attentional boundary' placed slightly to the left of the objective midline; (b) 'representational completion' that extends to the attentional boundary. |
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Authors:
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P W Halligan; J C Marshall |
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Publication Detail:
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Type: Case Reports; Comparative Study; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Cortex; a journal devoted to the study of the nervous system and behavior Volume: 24 ISSN: 0010-9452 ISO Abbreviation: Cortex Publication Date: 1988 Jun |
Date Detail:
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Created Date: 1988-10-21 Completed Date: 1988-10-21 Revised Date: 2009-11-11 |
Medline Journal Info:
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Nlm Unique ID: 0100725 Medline TA: Cortex Country: ITALY |
Other Details:
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Languages: eng Pagination: 321-8 Citation Subset: IM |
Affiliation:
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Rivermead Rehabilitation Centre, Oxford. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Brain Diseases / complications*, radiography Distance Perception* Humans Male Middle Aged Neuropsychological Tests* Reference Values Tomography, X-Ray Computed Vision Disorders / psychology* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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