Document Detail


Mechanisms of spatial attention revealed by hemispatial neglect.
MedLine Citation:
PMID:  10440080     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
We report performance by a patient, NG, with hemispatial neglect after nondominant stroke, in detecting briefly (200 msec) presented visual targets. NG's detection of targets (gaps in circles) was determined by the location of the target in the space in which stimuli appeared. Gaps on the neglected side of a circle at fixation were rarely detected when circles of uniform size were always presented at fixation. The same targets in the same location were detected far more often in blocks that also included targets presented on each side of the central circle, or in blocks that included larger target stimuli. In these blocks, the window of space in which stimuli appeared was larger, such that the target fell closer to the center of this "window". These results indicate that the spatial extent of attention, and of hemispatial neglect, can be modified on the the basis of expectations and task requirements.
Authors:
A E Hillis; J T Mordkoff; A Caramazza
Publication Detail:
Type:  Case Reports; Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Cortex; a journal devoted to the study of the nervous system and behavior     Volume:  35     ISSN:  0010-9452     ISO Abbreviation:  Cortex     Publication Date:  1999 Jun 
Date Detail:
Created Date:  1999-10-08     Completed Date:  1999-10-08     Revised Date:  2009-11-11    
Medline Journal Info:
Nlm Unique ID:  0100725     Medline TA:  Cortex     Country:  ITALY    
Other Details:
Languages:  eng     Pagination:  433-42     Citation Subset:  IM    
Affiliation:
Department of Neurology, Johns Hopkins Hospital, Baltimore, MD 21287, USA. argye@JHMI.edu
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MeSH Terms
Descriptor/Qualifier:
Aged
Attention / physiology*
Basal Ganglia / physiopathology
Cerebral Infarction / diagnosis,  physiopathology*,  psychology
Dominance, Cerebral / physiology*
Female
Humans
Orientation / physiology*
Parietal Lobe / physiopathology
Pattern Recognition, Visual / physiology*
Psychomotor Performance / physiology
Size Perception / physiology
Thalamus / physiopathology
Tomography, X-Ray Computed
Grant Support
ID/Acronym/Agency:
NS34073-02/NS/NINDS NIH HHS

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


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