| Project/Area Number |
26560300
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Rehabilitation science/Welfare engineering
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| Research Institution | Yamagata University |
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Principal Investigator |
NIIZEKI KYUICHI 山形大学, 大学院理工学研究科, 教授 (00228123)
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2014: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Keywords | 足圧中心 / 位相同期 / 加齢 / 足関節角度 / 姿勢制御 / 追随追跡 / 位相コヒーレンス / エージング / 随意的制御 / 位相シンクロ / 筋活動 |
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| Outline of Final Research Achievements |
The accuracy of targeted center of foot pressure (CoP) movement in anteroposterior (AP) direction was evaluated in young and elderly adults to determine whether the phase coupling between the CoP and target is predictive of age-related changes in postural control ability. Subjects tracked target displacement at a frequency of either 15, 10, or 7.5 cycle/min. The analytical signals of CoP and target were obtained by Hilbert transform, and the degree of the phase synchronization (λ) and the amplitude of the CoP (G) were quantified. The mean values ofλ and G decreased in elderly and their coefficient variations (CVs) were greater than those in young adults, suggesting that the ability to accurately perform CoP tracking deteriorates in elderly. We proposed a linear function that discriminate between young and elderly adults by using λ, G, and their CVs. The phase synchronization analysis during AP-CoP tracking task appears to be a tool to assess age-related AP balance ability.
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