Table 3. Symmetry of voltage attenuation in the morphology.

	0 Hz		100 Hz
Measured at:	elec	distal	elec	distal
dend1	0.95	0.93	0.70	0.65
dend2	0.90	0.92	0.51	0.64
contra tip	0.85	0.95	0.37	0.78
SIZ	0.83	0.65	0.10	0.33

Each row indicates a morphological location for which we simulated the ratio of voltage amplitude at measurement site over voltage at current injection site for two conditions: injecting distally and measuring at somatic electrode (elec), and injecting at the electrode and measuring distally (distal). Experiments were repeated for direct current (DC, 0 Hz) and high frequency (sinusoidal, 100 Hz) stimuli. In addition to the two dendritic locations (dend1 & 2) in the ipsilateral arbor shown in Fig 4A, we also tested the distal-most tip of the contralateral dendritic arbor (contra tip) and the spike initiation zone (SIZ—see Fig 6D).