2013 Fiscal Year Final Research Report
Why do muscle strain injuries occur frequently at a specific site of bi-articular muscles?
| Project/Area Number |
24650395
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Single-year Grants |
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| Research Field |
Sports science
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| Research Institution | National Institute of Fitness and Sports in Kanoya (2013)
Waseda University (2012) |
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Principal Investigator |
MIYAMOTO NAOKAZU 鹿屋体育大学, スポーツ生命科学系, 准教授 (20420408)
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| Co-Investigator(Renkei-kenkyūsha) |
KAWAKAMI Yasuo 早稲田大学, スポーツ科学学術院, 教授 (60234027)
WAKAHARA Taku 同志社大学, スポーツ健康科学部, 助教 (20508288)
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Keywords | 神経筋生理学 / 筋活動 / 筋内部位差 / 二関節筋 |
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| Research Abstract |
The motor nerve of the bi-articular rectus femoris muscle is generally split from the femoral nerve trunk into two sub-branches just before it reaches the distal and proximal regions of the muscle. The purpose of the present study was to examine whether the regional difference in muscle activities exists within the human rectus femoris muscle during maximal voluntary isometric contractions of knee extension and hip flexion. Surface electromyographic signals were recorded from the distal, middle, and proximal regions. There was no significant difference in the normalized electromyographic amplitude during knee extension among regions within the rectus femoris muscle, whereas those were significantly smaller in the distal than in the middle and proximal regions during hip flexion task. These results indicate that the bi-articular rectus femoris muscle is differentially controlled along the longitudinal direction.
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Research Products
(8 results)
