Verification of the analytical SFAP calculation.

a: Large homogeneous environment used for calculations in panel b. Locations of recording electrodes are marked by blue spheres (enlarged for visualization). b: SFAPs calculated in a large homogeneous volume using analytic method compared to reference result obtained using point-source approximation. c: Correlations between predicted and reference voltages in (b). The signals are in good agreement ( R 2 = 0.99, slope=0.97, intercept=10 −13 ). The black line represents perfect agreement. d: Simplified nerve geometry used for the calculations in panel (e). e: SFAP calculated using the analytical method compared to the reference result obtained using the Sim4Life Neural Sensing tool. f: Correlations between predicted and reference voltages in (e). The signals agree well ( R 2 = 0.99, slope=0.98, intercept=2 10 −10 ). The black line represents perfect agreement.