Revision 141705329 of "Anodenöffnungserregung" on dewiki

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'''Anode break excitation''' (ABE) is an electrophysiological phenomenon whereby a [[neuron]] fires [[action potentials]] in response to termination of a [[hyperpolarising]] current.

When a hyperpolarising current is applied across a membrane, the [[electrical potential]] across the membrane falls; this fall is followed by a drop in the threshold required for action potential (since the threshold is directly linked to the potential across the membrane - they rise and fall together).

ABE arises after the hyperpolarising current is terminated: the potential across the cell rises rapidly with the absence of hyperpolarising stimulus, but the action potential threshold stays at its lowered value. As a result, the potential is suprathreshold: sufficient to cause an action potential within the cell.

==See also==
* [[Action potential]]
* [[Hodgkin-Huxley model]]
* [[Neural accommodation]]

[[Category:Electrophysiology]]