Document Detail


Disorganized search on cancellation is not a consequence of neglect.
MedLine Citation:
PMID:  15249614     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND: Some studies have suggested that in stroke patients, spatial inattention on the cancellation test is closely related to disorganized visual search. However, methods to assess spatial aspects of search organization on cancellation tests have not been well developed. In this study the authors design and evaluate new methods to quantify strategies of spatial exploration on the cancellation test in stroke patients who showed a broad range of spatial attentional abilities, and test whether disorganization and inattention are related. METHODS: Twenty stroke patients were videotaped while they performed a cancellation test. Several variables that reflect spatial aspects of search organization were measured through subsequent video playback. Two patients with severe neglect were excluded from further analysis to avoid constraining the spatial expression of search organization. Spearman correlations were used to assess whether severity of spatial inattention correlated with the individual search organization measures. RESULTS: Of the 18 remaining patients, 10 had mild-moderate spatial neglect (pathologic inattention), while the other 8 omitted at most one target (normal performance). There were no significant correlations between the number of targets omitted and any of the search organization measures. CONCLUSIONS: Spatial inattention on cancellation due to neglect following stroke is not closely related to the organization of visual search. Instead, search disorganization during cancellation may reflect disturbance of an unspecified executive control mechanism.
Authors:
V W Mark; A J Woods; K K Ball; D L Roth; M Mennemeier
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Neurology     Volume:  63     ISSN:  1526-632X     ISO Abbreviation:  Neurology     Publication Date:  2004 Jul 
Date Detail:
Created Date:  2004-07-13     Completed Date:  2004-12-21     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  0401060     Medline TA:  Neurology     Country:  United States    
Other Details:
Languages:  eng     Pagination:  78-84     Citation Subset:  AIM; IM    
Affiliation:
Department of Physical Medicine and Rehabilitation, University of Alabama at Birmingham, 619 19 Street South, SRC 190, Birmingham, AL 35249-7330, USA. vwmark@uab.edu
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MeSH Terms
Descriptor/Qualifier:
Aged
Aged, 80 and over
Algorithms
Female
Humans
Male
Neuropsychological Tests*
Pattern Recognition, Visual
Perceptual Disorders / etiology,  psychology*
Psychomotor Performance*
Spatial Behavior
Stroke / complications,  psychology
Visual Perception
Grant Support
ID/Acronym/Agency:
HD40631/HD/NICHD NIH HHS; NS 39348/NS/NINDS NIH HHS; R03 AG 21256-01/AG/NIA NIH HHS; R03 HD042519-01A1/HD/NICHD NIH HHS

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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