duration curves. There is an inverse relationship between the
strength-duration time constants (longer per shorter) which are
0.583/0.497, 0.757/0.592 and 1.149/0.736 ms for the ISD1, ISD2 and
ISD3 cases without vs. with myelin aqueous layers, respectively.
However, an elongation of the strength-duration time constant
occurs more rapidly with the increase of the demyelination from
ISD1 to ISD3 in the case without aqueous layers. The strength-
duration time constant is substantially longer (1.149 ms) without
aqueous layers and longer (0.736 ms) with aqueous layers than the
normal one (0.291 ms) for the ISD3 case.
There is an inverse relationship between the strength-duration
time constants, however, they are shorter per longer (0.093/0.099, ...