S. No.

Symbol

Meaning

1

$c_{mk}\mathrm{,}{g}_{mk}$

membrane (capacitance, conductance) of the k-th axon

2

$\left(x\mathrm{,}t\right)$

(space, time) variables

3

$V_k$

transmembrane voltage of the k-th axon

4

$r_f$

axoplasmic resistance

5

$I_{eph}$

ephaptic current

6

$j_{ion}\mathrm{,}{j}_{ex}$

(ionic, extracellular) current input

7

UB, LB

(upper, lower) bound

8

$d_e\mathrm{,}{d}_p$

(epineurium, perineurium) thickness

9

${\sigma }_e\mathrm{,}{\sigma }_p$

(epineurium, perineurium) conductivity

10

$I_r$

relaxation current

11

$\epsilon$

small positive constant