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Predicate | Object |
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rdf:type | |
lifeskim:mentions | |
pubmed:issue |
5
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pubmed:dateCreated |
1997-12-3
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pubmed:abstractText |
Post-exercise facilitation and post-exercise depression are phenomena described in motor evoked potentials (MEPs) elicited to transcranial magnetic stimulation. Brief, non-fatiguing muscle activation produces post-exercise facilitation, and prolonged fatiguing muscle activation produces post-exercise depression. We studied 12 normal subjects to determine whether post-exercise depression occurs before fatigue is reached. We recorded MEPs from the resting extensor carpi radialis muscle after increasing the duration of isometric wrist extension, at 50% of maximum voluntary contraction, until the muscle fatigued. Fatigue was defined as the inability to maintain that force. The mean exercise duration before the muscle fatigued was 130 s, and post-exercise depression occurred only beyond 90 s of exercise. We conclude that post-exercise depression is detectable only after prolonged muscle activation.
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pubmed:language |
eng
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pubmed:journal | |
pubmed:citationSubset |
IM
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pubmed:status |
MEDLINE
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pubmed:month |
Oct
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pubmed:issn |
0013-4694
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pubmed:author | |
pubmed:issnType |
Print
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pubmed:volume |
105
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
352-6
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pubmed:dateRevised |
2008-11-21
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pubmed:meshHeading |
pubmed-meshheading:9362999-Adult,
pubmed-meshheading:9362999-Electric Stimulation,
pubmed-meshheading:9362999-Evoked Potentials, Motor,
pubmed-meshheading:9362999-Female,
pubmed-meshheading:9362999-Humans,
pubmed-meshheading:9362999-Magnetics,
pubmed-meshheading:9362999-Male,
pubmed-meshheading:9362999-Middle Aged,
pubmed-meshheading:9362999-Muscle, Skeletal,
pubmed-meshheading:9362999-Muscle Fatigue,
pubmed-meshheading:9362999-Physical Exertion,
pubmed-meshheading:9362999-Time Factors
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pubmed:year |
1997
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pubmed:articleTitle |
Post-exercise depression of motor evoked potentials as a function of exercise duration.
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pubmed:affiliation |
Human Motor Control Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20892-1428, USA.
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pubmed:publicationType |
Journal Article
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