Biomedical Engineering Reference
In-Depth Information
Table 8.1.
Summary of constants and functions for the HVC-RA model.
v
=
V
−
E
rest
is the deviation of the membrane potential from its resting value (in
units of mV); the functions
α
x
and
β
x
are in units of ms
−
1
; the conductances
g
,
Γ
0
and
γ
0
are in units of mS/cm
2
; the potentials
E
x
and
V
pre
are in units of mV; and
the current
I
DC
is in units of
µ
A/cm
2
α
m
=0
.
1
25
−
v
exp ((25
−
v
)
/
10)
−
1
β
m
=4exp
−
v
18
α
h
=0
.
07 exp
−
v
20
1
exp ((30
−
v
)
/
10) + 1
α
n
=0
.
01
10
−
v
exp ((10
−
v
)
/
10)
−
1
β
h
=0
.
125 exp
−
v
β
h
=
80
1
1+exp(10
−
V
pre
)
α
S
=0
.
15
g
Na
= 120
g
K
=36
g
L
=0
.
3
g
j
HE
=17
.
7
g
j
HI
=7
.
5
g
HI
HE
=10
.
5
g
RI
=75
g
RI
RE
=7
.
5
g
R
HE
=5
Γ
0
=18
.
62
γ
0
=3
.
5
E
L
=
−
64
E
Na
=50
E
K
=
−
95
E
E
=0
E
I
=
−
80
I
DC
=1
.
93
