Fig. 6

BRrate during a control case in which the electrode connections were swapped. Vagal stimulation was delivered via the CE and the LFAC waveform was presented at the RE. In this control case, the percent block (± SD) during the ’LFAC+Stim’ epoch was calculated to be -22%. A negative percent block indicates that the breathing rate during ’LFAC+Stim’ was lower than the breathing rate of the ’Stim Only’ epoch