Document Detail

Movement-related cortical potentials in persistent mirror movements.
MedLine Citation:
PMID:  7489664     Owner:  NLM     Status:  MEDLINE    
Mirror movements (MMs) are involuntary movements executed on one side of the body during voluntary movements of the contralateral homologous body parts which may abnormally persist into adulthood. In 6 subjects affected by persistent MM with autosomal dominant inheritance, movement-related cortical potentials (MRCPs) during self-paced, voluntary extensions of either the left or right middle finger were recorded from 30 EEG electrodes simultaneously with the electromyogram (EMG) of both extensor digitorum communis muscles. The negative potentials before and during EMG onset were evaluated statistically for the two electrodes next to the cortical hand areas. A comparison with 7 normal subjects revealed no marked differences for the Bereitschaftspotential (BP) and the negative slope (NS'). Only in the periods around EMG onset (from -50 to +50 msec) a significant difference between both groups was found. The MM subjects showed fairly symmetric potentials over the right and left hemispheres, whereas the potentials of the control subjects were lateralized to the hemisphere contralateral to the intended movement. No difference was found for the amplitude of the maximum negative peak of MRCP following EMG onset. Our data showed no evidence for a different type of movement preparation in MM subjects as compared to normals. We propose that the additional ipsilateral cortical activation around movement onset may be the cortical mechanism, which compensates for abnormal ipsilateral corticospinal pathways in subjects with persistent MM.
M Mayer; K Bötzel; W Paulus; H Plendl; D Pröckl; A Danek
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Electroencephalography and clinical neurophysiology     Volume:  95     ISSN:  0013-4694     ISO Abbreviation:  Electroencephalogr Clin Neurophysiol     Publication Date:  1995 Nov 
Date Detail:
Created Date:  1996-01-04     Completed Date:  1996-01-04     Revised Date:  2008-09-09    
Medline Journal Info:
Nlm Unique ID:  0375035     Medline TA:  Electroencephalogr Clin Neurophysiol     Country:  IRELAND    
Other Details:
Languages:  eng     Pagination:  350-8     Citation Subset:  IM    
Department of Neurology, Ludwig-Maximilians-Universität, Klinikum Grosshadern, Munich, Germany.
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MeSH Terms
Evoked Potentials, Motor*
Functional Laterality
Middle Aged
Motor Cortex / physiopathology*
Movement Disorders / physiopathology*
Task Performance and Analysis

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