Fig. 4: Respiratory phase and resting state EEG amplitude.
From: Breathing is coupled with voluntary action and the cortical readiness potential
a Waveform of resting state EEG amplitude time-locked to the respiration (i.e., inspiration) peak obtained from fronto-central electrodes (n = 50). Gray shaded area represents the s.e.m. b Resting state EEG amplitude as a function of six equally sized bins of respiratory phase. Error bars represent the s.e.m. c Histogram of the summed statistics (i.e., Modulation index) obtained from surrogate respiration data whose phase is randomly shifted. The blue vertical line indicates the summed statistics from original respiration data. The result suggests that respiration-locked resting state EEG amplitude does not depend on the respiratory phase (permutation p = 0.60).
