Document Detail

Motor evoked potentials: a new method of controlled facilitation using quantitative surface EMG.
MedLine Citation:
PMID:  1371742     Owner:  NLM     Status:  MEDLINE    
A new method of assessing MEP facilitation using surface EMG under computer control is described. Transcranial magnetic stimulation with voluntary contraction at a value between 2 and 6% of maximal surface EMG activity produced responses with shortest latencies and largest amplitudes and power. No significant changes occurred when facilitation increased beyond this level. These results are similar to previously published studies using a force transducer, confirming the reliability of the system as an alternative method of monitoring voluntary contraction. The controlling system may potentially provide an easy, flexible, quantitative method of ensuring adequate, reproducible facilitation with minimum EMG interference for testing in a clinical setting.
C L Lim; C Yiannikas
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Electroencephalography and clinical neurophysiology     Volume:  85     ISSN:  0013-4694     ISO Abbreviation:  Electroencephalogr Clin Neurophysiol     Publication Date:  1992 Feb 
Date Detail:
Created Date:  1992-04-07     Completed Date:  1992-04-07     Revised Date:  2008-09-09    
Medline Journal Info:
Nlm Unique ID:  0375035     Medline TA:  Electroencephalogr Clin Neurophysiol     Country:  IRELAND    
Other Details:
Languages:  eng     Pagination:  38-41     Citation Subset:  IM    
Department of Neurophysiology, Westmead Hospital, Sydney, NSW, Australia.
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MeSH Terms
Electromyography / methods*
Evoked Potentials / physiology
Magnetics / diagnostic use
Muscle Contraction / physiology
Muscles / physiology*
Reaction Time

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