Linked Life Data

16328281

Source:http://linkedlifedata.com/resource/pubmed/id/16328281

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SubjectPredicateObjectContext
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pubmed-article:16328281pubmed:dateCreated2006-3-21lld:pubmed
pubmed-article:16328281pubmed:abstractTextThe present study was performed to examine if there are functional differences between the first dorsal interosseous (FDI) and the abductor digit minimi (ADM) muscles during different muscle contractions, namely dynamic and static contractions of the index and little finger abductions. It was also examined whether these functional differences occur at the cortical level. The motor evoked potentials (MEPs) elicited by transcranial magnetic stimulation (TMS) and force curves, during the muscle contractions, were simultaneously recorded. Rest motor thresholds (RMTs) and active motor thresholds (AMTs), during dynamic and static contractions, were determined in the two muscles. In all trials, the background EMGs (B.EMGs) were kept at the same level in each muscle. Results showed that the target matching errors of dynamic contractions were statistically smaller in the FDI muscle than those in the ADM. In the FDI muscle, the AMT during dynamic contractions was significantly lower than during static ones and the MEPs elicited by TMS were larger during dynamic contractions than those during static ones. However, such results were not found in the ADM muscle. In order to investigate whether the differences were caused by the excitability changes that occurred in the cortical level, the responses elicited by subcortical stimulations were recorded using the same procedures as the experiment of TMS. Responses to subcortical stimulations during dynamic contractions were similar to those during static ones in either muscle. It is concluded that there are differences in the task-dependent MEP facilitations between the FDI and ADM muscles. And the differences are due to the functional demanded excitability changes accompanied by the cortical activation.lld:pubmed
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pubmed-article:16328281pubmed:authorpubmed-author:KasaiTatsuyaTlld:pubmed
pubmed-article:16328281pubmed:authorpubmed-author:YahagiSusumuSlld:pubmed
pubmed-article:16328281pubmed:authorpubmed-author:TanakaYoshiyu...lld:pubmed
pubmed-article:16328281pubmed:authorpubmed-author:TakahashiMako...lld:pubmed
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pubmed-article:16328281pubmed:authorpubmed-author:TsujiToshioTlld:pubmed
pubmed-article:16328281pubmed:authorpubmed-author:NiZhenZlld:pubmed
pubmed-article:16328281pubmed:authorpubmed-author:LiangNanNlld:pubmed
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pubmed-article:16328281pubmed:volume170lld:pubmed
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pubmed-article:16328281pubmed:pagination141-8lld:pubmed
pubmed-article:16328281pubmed:dateRevised2009-11-11lld:pubmed
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pubmed-article:16328281pubmed:year2006lld:pubmed
pubmed-article:16328281pubmed:articleTitleFunctional demanded excitability changes of human hand motor area.lld:pubmed
pubmed-article:16328281pubmed:affiliationDivision of Sports and Health Sciences, Graduate School for International Development and Cooperation, Hiroshima University, 1-5-1 Kagamiyama, 739-8529, Higashihiroshima, Japan.lld:pubmed
pubmed-article:16328281pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:16328281pubmed:publicationTypeResearch Support, Non-U.S. Gov'tlld:pubmed
http://linkedlifedata.com/r...pubmed:referesTopubmed-article:16328281lld:pubmed