Why the study?
Does paced breathing alter EEG power changes and rhythmical variability in alpha, beta, and theta bands compared to rest?
Does paced breathing alter EEG power changes and rhythmical variability in alpha, beta, and theta bands compared to rest?
Paced breathing alters cortical excitability and sensitivity to desynchronizing influences in a frequency-dependent manner.
Paced breathing may modulate cortical rhythms frequency-dependently; leaves open effects on cardiovascular autonomic control.
Multichannel EEG, respiration, blood pressure and ECG were recorded during paced breathing at five frequencies in 18 subjects in order to elucidate the effects of paced breathing on power changes in alpha, beta and theta bands, and on rhythmical variability of these parameters. Mean power in the beta band and low-frequency beta power variability (0.12–0.04 Hz) increased during paced breathing at frequencies of 0.25 and 0.20 Hz. The total variability of alpha power in the right parietal and occipital electrodes decreased during paced breathing at 0.1 Hz compared with initial rest. The results point to increased cortical excitability during paced breathing at eupnoeic frequencies and to diminished cortical sensitivity to desynchronizing influences during paced breathing at 0.1 Hz.
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Stančák et al. (1993) studied this question.
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