| Standardization of facilitation of compound muscle action potentials using a modified myometer during magnetic stimulation in healthy volunteers. | |
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MedLine Citation:
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PMID: 7511526 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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In 20 normal subjects motor evoked potentials (MEPs) from first dorsal interosseous (FDI) were obtained following transcranial magnetic stimulation during relaxation and voluntary contraction of 2-20% of maximum. A new method to standardize facilitation of MEP using surface EMG and a modified myometer was used. The MEP amplitudes increased significantly at contraction levels of 2%, 10% and 15% of maximum. The latencies decreased significantly at contraction levels of 2%, 5% and 15%. Coefficients of variation of the amplitude decreased from 6.4% during relaxation to approximately 2% during facilitation. In contrast, coefficients of variation of take-off latencies (T-lat) increased significantly from 1.7% during relaxation to approximately 3% during facilitation. The variability of amplitudes and latencies was mainly due to inter-individual variation. The observations in the present study indicate that the actual contraction level should be precisely defined during transcranial magnetic stimulation. |
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Authors:
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J F Nielsen |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Electroencephalography and clinical neurophysiology Volume: 93 ISSN: 0013-4694 ISO Abbreviation: Electroencephalogr Clin Neurophysiol Publication Date: 1994 Feb |
Date Detail:
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Created Date: 1994-05-05 Completed Date: 1994-05-05 Revised Date: 2008-09-09 |
Medline Journal Info:
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Nlm Unique ID: 0375035 Medline TA: Electroencephalogr Clin Neurophysiol Country: IRELAND |
Other Details:
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Languages: eng Pagination: 75-9 Citation Subset: IM |
Affiliation:
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Department of Neurology, Arhus University Hospital, Denmark. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Action Potentials
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physiology* Adult Electromyography Female Humans Magnetics / diagnostic use* Male Middle Aged Muscles / physiology* Reaction Time / physiology Reference Standards Reference Values |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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