Cardiorespiratory Dynamic Response to Mental Stress: A Multivariate Time-Frequency Analysis

Figure 7

Median instantaneous respiratory frequency (𝐹_𝑟(𝑡)), heart rate (HR(𝑡)), coherence (𝛾^𝛽𝑟_𝑅𝑟(𝑡)), and phase difference (Θ^𝛽𝑟_𝑅𝑟(𝑡)) in the time-varying band 𝛽_𝑟(𝑡). The standard error is shaded. The bars below each subplot indicate the time instances of significant differences between RD and the tasks.

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