<s>
Anode	B-Algorithm
break	I-Algorithm
excitation	I-Algorithm
(	O
ABE	O
)	O
is	O
an	O
electrophysiological	O
phenomenon	O
whereby	O
a	O
neuron	O
fires	O
action	B-Algorithm
potentials	I-Algorithm
in	O
response	O
to	O
termination	O
of	O
a	O
hyperpolarizing	O
current	O
.	O
</s>
<s>
When	O
a	O
hyperpolarizing	O
current	O
is	O
applied	O
across	O
a	O
membrane	O
,	O
the	O
electrical	O
potential	O
across	O
the	O
membrane	O
falls	O
(	O
becomes	O
negative	O
of	O
the	O
resting	O
potential	O
)	O
;	O
this	O
fall	O
is	O
followed	O
by	O
a	O
drop	O
in	O
the	O
threshold	O
required	O
for	O
action	B-Algorithm
potential	I-Algorithm
(	O
since	O
the	O
threshold	O
is	O
directly	O
linked	O
to	O
the	O
potential	O
across	O
the	O
membrane	O
-	O
they	O
rise	O
and	O
fall	O
together	O
)	O
.	O
</s>
<s>
ABE	O
arises	O
after	O
the	O
hyperpolarizing	O
current	O
is	O
terminated	O
:	O
the	O
potential	O
across	O
the	O
cell	O
rises	O
rapidly	O
with	O
the	O
absence	O
of	O
hyperpolarizing	O
stimulus	O
,	O
but	O
the	O
action	B-Algorithm
potential	I-Algorithm
threshold	O
stays	O
at	O
its	O
lowered	O
value	O
.	O
</s>
<s>
As	O
a	O
result	O
,	O
the	O
potential	O
is	O
suprathreshold	O
:	O
sufficient	O
to	O
cause	O
an	O
action	B-Algorithm
potential	I-Algorithm
within	O
the	O
cell	O
.	O
</s>
