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

Figure 10

Median instantaneous frequency for TF spectra 𝑆_RR(𝑡,𝑓), 𝑆_RR,𝑟(𝑡,𝑓), and 𝑆_RR/𝑟(𝑡,𝑓) in the HF band. The standard error is shaded. The bars below each subplot indicate the time instances of significant differences between RD and the tasks.