Document Detail

Improvement of hemispatial neglect with cold-water calorics: an electrophysiological test of the arousal hypothesis of neglect.
MedLine Citation:
PMID:  9260449     Owner:  NLM     Status:  MEDLINE    
Introducing ice-water into the left ear of right-brain-damaged patients attenuates unilateral neglect symptoms. By examining EEG changes over each hemisphere during this procedure, we were able to test a hypothesis concerning the mechanism of cold-water calorics and the attention-arousal hypothesis of hemispatial neglect. We present a case study of an 83-year-old woman with a massive right-hemisphere CVA exhibiting severe hemispatial neglect. Caloric stimulation produced a leftward eye deviation to central position, and a temporary partial remission of neglect symptoms. Significant changes in EEG activation indicated a central mechanism associated with the regularization of eye gaze. Caloric stimulation also produced a significant interaction between EEG frequency band and hemisphere, indicating that while both hemispheres increased in cortical activation, the right hemisphere increase was significantly greater. This supports the activation-arousal hypothesis of neglect over the mutual inhibition model.
H J Storrie-Baker; S J Segalowitz; S E Black; J A McLean; N Sullivan
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Publication Detail:
Type:  Case Reports; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of the International Neuropsychological Society : JINS     Volume:  3     ISSN:  1355-6177     ISO Abbreviation:  J Int Neuropsychol Soc     Publication Date:  1997 Jul 
Date Detail:
Created Date:  1997-09-19     Completed Date:  1997-09-19     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9503760     Medline TA:  J Int Neuropsychol Soc     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  394-402     Citation Subset:  IM    
Department of Psychology, West Park Hospital, Toronto, Ontario, Canada.
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MeSH Terms
Aged, 80 and over
Arousal / physiology*
Auditory Perception / physiology*
Caloric Tests / psychology*
Cerebral Infarction / psychology*,  radiography,  therapy*
Hypothermia, Induced*
Tomography, X-Ray Computed
Reg. No./Substance:

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