| Project/Area Number |
22650155
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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 |
Applied health science
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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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| Research Collaborator |
SAITOH Tadashi 山形大学, 大学院・理工学研究科, 助教 (20454770)
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| Project Period (FY) |
2010 – 2011
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| Project Status |
Completed (Fiscal Year 2011)
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| Budget Amount *help |
¥2,660,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥360,000)
Fiscal Year 2011: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2010: ¥1,100,000 (Direct Cost: ¥1,100,000)
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| Keywords | ストレスマネジメント / カップリング / 位相同期 / 呼吸性不整脈 / 精神課題 / 唾液アミラーゼ / クロモグラニン |
|---|
| Research Abstract |
We proposed a new psychological stress index using the phase-lag variations between respiratory sinus arrhythmia (RSA) and breathing. Heart rate (HR), systolic blood pressure, and breathing frequency (f_R) increased in response to mental arithmetic test, while the amplitude of RSA (A_<RSA>), high-frequency (HF) component of HR variability (HRV) and the degree of phase synchronization (λ) between RSA and breathing decreased. The λ was correlated with normalized A_<RSA> and the HF power of HRV, and was inversely related with normalized low-frequency (LF) component to HF ratio. In addition, λ was not susceptible to f_R influence. It is suggested that the λ could be a marker for assessing the interaction between psychological states and autonomic control.
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