18 Phase Coherence of Finger Skin Blood Flow …
285
Fig. 18.2 Phase coherence
of skin blood flow
oscillations of left and right
fingers under spontaneous
breathing before (red color)
and after (black color)
controlled breathing
practices
Below we provide the results of the analysis of the influence of controlled
breathing with different frequencies on the phase coherence between SBF left –SBF right
pair (Fig. 18.3). One can see that all breathing regimes caused a significant increase
in phase coherence values at the appropriate frequency.
To estimate the influence of the controlled breathing on phase correlation between
respiratory-related blood flow oscillations of left and right finger skin, we calculated
the ratio of the phase coherence value at defined frequency of controlled breathing
to the value at the same frequency during spontaneous breathing. The results are
Fig. 18.3 Phase coherence of skin blood flow oscillations of left and right fingers under spontaneous
(black color) and controlled (blue color) breathing with the following frequencies: 0.05 Hz (a), 0.07
Hz (b), 0.10 Hz (c), 0.16 Hz (d) and 0.25 Hz (e). Vertical red lines correspond breathing rates. Areas
of significant changes are grey
285
Fig. 18.2 Phase coherence
of skin blood flow
oscillations of left and right
fingers under spontaneous
breathing before (red color)
and after (black color)
controlled breathing
practices
Below we provide the results of the analysis of the influence of controlled
breathing with different frequencies on the phase coherence between SBF left –SBF right
pair (Fig. 18.3). One can see that all breathing regimes caused a significant increase
in phase coherence values at the appropriate frequency.
To estimate the influence of the controlled breathing on phase correlation between
respiratory-related blood flow oscillations of left and right finger skin, we calculated
the ratio of the phase coherence value at defined frequency of controlled breathing
to the value at the same frequency during spontaneous breathing. The results are
Fig. 18.3 Phase coherence of skin blood flow oscillations of left and right fingers under spontaneous
(black color) and controlled (blue color) breathing with the following frequencies: 0.05 Hz (a), 0.07
Hz (b), 0.10 Hz (c), 0.16 Hz (d) and 0.25 Hz (e). Vertical red lines correspond breathing rates. Areas
of significant changes are grey