Hodgkin-Huxley Nerve Model
(
U
,
V
1
)-phase diagram of the Hodgkin-Huxley equation; two trajectories:
U
(0)=-5 and -6, with
V
1
(0)=0.31,
V
2
(0)=0.05,
V
3
(0)=0.6 and
I
a
=0.