Document Detail


Motor extinction in distinct reference frames: a double dissociation.
MedLine Citation:
PMID:  22713397     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
OBJECTIVE: Test the hypothesis that right hemisphere stroke can cause extinction of left hand movements or movements of either hand held in left space, when both are used simultaneously, possibly depending on lesion site.
METHODS: 93 non-hemiplegic patients with acute right hemisphere stroke were tested for motor extinction by pressing a counter rapidly for one minute with the right hand, left hand, or both simultaneously with their hands held at their sides, or crossed over midline.
RESULTS: We identified two distinct types of motor extinction in separate patients; 20 patients extinguished left hand movements held in left or right space (left canonical body extinction); the most significantly associated voxel cluster of ischemic tissue was in the right temporal white matter. Seven patients extinguished either hand held in left space (left space extinction), and the most significantly associated voxel cluster of ischemic tissue was in right parietal white matter.
CONCLUSIONS: There was a double dissociation between left canonical body extinction and left space motor extinction. Left canonical body extinction seems to be associated with more dorsal (parietal) ischemia, and left canonical body extinction seems to be associated with more ventral (temporal) ischemia.
Authors:
Jennifer Heidler-Gary; Mikolaj Pawlak; Edward H Herskovits; Melissa Newhart; Cameron Davis; Lydia A Trupe; Argye E Hillis
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural    
Journal Detail:
Title:  Behavioural neurology     Volume:  26     ISSN:  1875-8584     ISO Abbreviation:  Behav Neurol     Publication Date:  2013  
Date Detail:
Created Date:  2012-11-28     Completed Date:  2013-05-13     Revised Date:  2014-01-10    
Medline Journal Info:
Nlm Unique ID:  8914585     Medline TA:  Behav Neurol     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  111-9     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Aged
Brain Infarction / complications,  physiopathology*
Female
Functional Laterality / physiology*
Humans
Male
Middle Aged
Perceptual Disorders / complications,  physiopathology*
Psychomotor Disorders / physiopathology*
Grant Support
ID/Acronym/Agency:
R01 DC005375/DC/NIDCD NIH HHS; R01 NS R01047691/NS/NINDS NIH HHS; R01 NS047691/NS/NINDS NIH HHS; R01 NS047691-08/NS/NINDS NIH HHS
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