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. Author manuscript; available in PMC: 2017 Jul 1.
Published in final edited form as: Steroids. 2016 Mar 24;111:100–112. doi: 10.1016/j.steroids.2016.03.010

Fig. 4.

Fig. 4

Histamine (HA) enhances the depolarization induced by current injection. Superimposed traces are depolarizations of the neuron injected with a “threshold” current of 45 pA (see protocol in the inset) before (Pre, with one AP), peak response after HA application (HA, with three APs) and recovery following wash out (Rcv, with one AP). In addition to increasing number of AP, HA also shortened the latency to the first APs and increase the rate of depolarization. Effects on “relative depolarization” and AP threshold are illustrated in Fig. 5.