Document Detail

Tight link between our sense of limb ownership and self-awareness of actions.
MedLine Citation:
PMID:  18162622     Owner:  NLM     Status:  MEDLINE    
BACKGROUND AND PURPOSE: Hemiparetic stroke patients with disturbed awareness for their motor weakness (anosognosia for hemiparesis/-plegia [AHP]) may exhibit further abnormal attitudes toward or perceptions of the affected limb(s). The present study investigated the clinical relationship and the anatomy of such abnormal attitudes and AHP. METHODS: In a new series of 79 consecutively admitted acute stroke patients with right brain damage and hemiparesis/-plegia, different types of abnormal attitudes toward the hemiparetic/plegic limb (asomatognosia, somatoparaphrenia, anosodiaphoria, misoplegia, personification, kinaesthetic hallucinations, supernumerary phantom limb) were investigated. RESULTS: Ninty-two percent of the patients with AHP showed additional "disturbed sensation of limb ownership" (DSO) for the paretic/plegic limb. The patients had the feeling that their contralesional limb(s) do not belong to their body or even belong to another person. Analysis of lesion location revealed that the right posterior insula is a crucial structure involved in these phenomena. CONCLUSIONS: DSO for hemiparetic/-plegic limbs and AHP are tightly linked both clinically and anatomically. The right posterior insula seems to be a crucial structure involved in the genesis of our sense of limb ownership and self-awareness of actions.
Bernhard Baier; Hans-Otto Karnath
Publication Detail:
Type:  Letter; Research Support, Non-U.S. Gov't     Date:  2007-12-27
Journal Detail:
Title:  Stroke; a journal of cerebral circulation     Volume:  39     ISSN:  1524-4628     ISO Abbreviation:  Stroke     Publication Date:  2008 Feb 
Date Detail:
Created Date:  2008-01-29     Completed Date:  2008-02-20     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0235266     Medline TA:  Stroke     Country:  United States    
Other Details:
Languages:  eng     Pagination:  486-8     Citation Subset:  IM    
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MeSH Terms
Acute Disease
Aged, 80 and over
Body Image*
Cerebral Cortex / physiopathology
Functional Laterality
Hallucinations / physiopathology,  psychology
Hemiplegia / physiopathology*,  psychology*
Middle Aged
Paresis / physiopathology*,  psychology*
Stroke / physiopathology,  psychology

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