2011 Fiscal Year Final Research Report
Non-invasive analysis of recruitment properties of human motor units using electrical muscle stimulation
| Project/Area Number |
21700651
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Sports science
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| Research Institution | The University of Tokyo |
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Principal Investigator |
SASAKI Kazushige 東京大学, 大学院・総合文化研究科, 助教 (00451849)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 生理学 / 骨格筋 / 単収縮 / サイズの原理 / 筋電図 |
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| Research Abstract |
The purpose of this study was to test whether recruitment properties of human motor units can be non-invasively determined by using electrical muscle stimulation. Specifically, a single electrical pulse was applied to the resting muscle before and after a 6-s voluntary force production and then the "potentiation" of electrically evoked contractile response due to the voluntary force production was determined. The results suggest that the magnitude of potentiation represents the recruitment properties of fast-twitch muscle fibers during voluntary muscle contraction predicted from the "size principle".
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