Figure 6. Robust and variable cardiac rhythm activity across pH.

(A) Two example cardiac ganglion experiments with an acid-first protocol. Each colored box displays 12 s of extracellular recordings of the trunk taken from the last minute of each pH condition. Small Cell (SC) and Large Cell (LC) activity is visible. Each experiment can be read left to right then top to bottom in chronological order. (B) Cardiac frequency, (C) number of LC spikes per burst, and (D) LC duty cycle were calculated for CG #1 for each pH step. Violin plots show the KDE distribution, mean, median, IQR, and 95% CI for each measure across pH conditions. Recoveries from acid and base are displayed in the shaded gray regions on the far ends of each plot.