| Project/Area Number |
13680010
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
体育学
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| Research Institution | Hokkaido University |
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Principal Investigator |
YAMADA Norimasa Hokkaido Univ,, Grad. School of Education., Asso. Prof., 大学院・教育学研究科, 助教授 (00210469)
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| Project Period (FY) |
2001 – 2002
|
| Project Status |
Completed (Fiscal Year 2002)
|
| Budget Amount *help |
¥3,300,000 (Direct Cost: ¥3,300,000)
Fiscal Year 2002: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 2001: ¥1,900,000 (Direct Cost: ¥1,900,000)
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| Keywords | joint stiffness / electromagnetic torque motor system / co-contraction / 身体運動 |
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| Research Abstract |
The purpose of this study is to investigate the modulation mechanism of joint stiffness during human rhythmic movement. To estimate the mechanical properties of the elbow joint, external perturbations were applied by an electromagnetic torque motor system to the forearm of each subject during the movement. Joint stiffness showed a significant quadratic trend with a minimum close to the natural frequency of the apparatus-limb system. This results suggested that 1) the mechanism by which joint stiffness is modulated may change according to the relation between natural frequency and movement frequency, and 2) the co-contraction mechanism is less important for maintaining joint stiffness during slow movement than during fast movement.
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