Table 1.

Translating a current strength of tDCS/tACS (left column) into a voltage gradient (right column) that is used in animal studies. At first, an intracranial current density must be computed in a simulation. If this is multiplied by the gray matter resistivity it yields the voltage gradient.

	tDCS/tACS intensity	Intracranial current density	Gray matter resistivity	Intracranial voltage gradient
Unit	mA	A/m2	Ωm	V/m
Value	1	0.1	3.03	0.303