Biomedical Engineering Reference
In-Depth Information
Figure 5
. Episodic and rhythmic behavior of the full system (Eqs. [1]-[3]). (
A
) Time varia-
tions of
a
and
s
, showing the episodic behavior with fast oscillations. Note that episodes and
intervals between episodes are shorter than in Figure 4A. This is mostly because episodes
terminate at a higher value of
s
when fast depression is present. (
B
) Detail of an episode on a
faster time scale, showing the fast oscillations of
a
and
d
.
Finally, note that if we had used Eq. [3'] instead of Eq. [3], that is, if we had
considered a cellular adaptation mechanism instead of a synaptic depression
mechanism to drive the episodic behavior, we would obtain a similar dynamical
behavior of the system. At this point, we do not see a qualitative distinction be-
tween these two mechanisms (cellular or synaptic) of episode generation. In the
next sections, we denote these models the
s
-model (synaptic depression) and the
