Figure 3.

Heterogeneous sodium availability during rotor drift. (A) (Left) Voltage snapshot (gray scale) with superimposed trajectory of rotor SP (yellow tracing) drifting from the center of the model (red dot) toward its final location at the PV edge (blue dot). (Right) Color-coded time-space plot for h×j along the rotor drift direction (red solid line in voltage snapshot). (Inset) Magnified view showing close to the rotor core h×j is larger on the LA side than on the PV side (red arrows). (B) (Left) Snapshots of voltage (gray scale) and h×j (color-coded) maps at two instances; when the rotor wave-front near the core is directed from PV to LA (top); and approximately a half-cycle later, when it is directed from LA to PV (bottom). (Blue dots) Tip of the rotor; (white dots) 4 mm from tip, toward LA (top) and toward PV (bottom). (Right) Single-pixel time-series showing simultaneous voltage and h×j (white dots). (Red arrows) Times of the voltage and h×j snapshots on the left side of the panel.