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

Figure 5

Example of RR interval series (RR) and respiratory (resp) signal and their TF spectra (𝑆_RR(𝑡,𝑓),𝑆_𝑟𝑟(𝑡,𝑓)) and coherence (𝛾_𝑅𝑟(𝑡,𝑓)) during documentary watching and the first mental stress task. Vertical lines indicate the onset of RD (a) and MT1 (b).

(a)

(b)