Biomedical Engineering Reference
In-Depth Information
3.2.4 Phase3-Hyperpolarization
In the Hodgkin-Huxley model, the
n
-gate does not return the membrane directly to rest. Instead,
V
m
drops slightly below
V
rest
,a
hyperpolarization
, and then depolarizes back to rest.
m
ï
ï
ï
ï
7LPHPVHF
Figure 3.7:
Hodgkin-Huxley action potential and currents.
3.3
PROPERTIES OF NEURONAL ACTION POTENTIALS
The Hodgkin-Huxely model was successful largely because it explained the origin of four of the most
important features of an action potential. We review these properties below and related them to the
relevant parts of the model.
