2011 Fiscal Year Final Research Report
Development of a new stress assessment system using cardiorespiratory coupling index
| 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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| Keywords | ストレスマネジメント / カップリング |
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| 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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Research Products
(22 results)
