Figure 6. LAP optimal waveforms 
and 
for the 0D HHM: The 
approximation of the ionic current is used for a case of very short duration (
= 10 
) and the 
approximation is used for a case of long duration (
= 5 
) (see the Box).
As with the IM, bvp4c was used to numerically solve the BVP of eqn. (34). The figure follows a quite similar format to Fig. 5. 
can also be assumed higher or lower. All the maximal ionic conductances in the HHM (see also Table 3) are temperature-dependent and are linearly proportional to the coefficient 
. The 3 solutions shown correspond to the ionic current at 
(cyan trace), twice higher (thin red dash-dot), or twice lower (thick dashed black) 
respectively. From eqn. (42) we can see that 
= 1.6047 (half the nominal) at 
, and 
= 6.4188 (twice the nominal) for at 
. Box: Resting-state 
and asymptotic-state 
ionic currents for the 0D HHM; Markers are inserted at the resting and threshold membrane-voltage points, respectively 
= −77 
, 
= −64.55 
and 
= −52.35 
.