Table 2. Action potential properties of CeA neurons from Scn4b KO and WT mice.

Spike after-hyperpolarization after the first spike is calculated relative to the spike threshold. Maximal positive slope represents a maximal voltage slope during the spike upshot phase (mediated primarily by sodium channels). Maximal negative slope represents a maximal voltage slope during the spike falling phase (mediated primarily by potassium channels).

Mice (number of cells)	Amplitude(mV)	Spike Rise Time (ms)	Spike Decay Time (ms)	Half-Width (ms)	Spike After-hyperpolari-zation (mV)	Maximal Positive Slope (mV/ms)	Phase of Maximal Positive Slope	Maximal Negative Slope (mV/ms)	Phase of Maximal Negative Slope	Pos/Neg Slope Ratio
WT (n = 20)	86.4 ± 1.8	1.2 ± 0.05	3.0 ± 0.2	1.8 ± 0.1	12.5 ± 0.9	156.5 ± 10.8	0.6 ± 0.01	−51.4 ± 4.7	0.73 ± 0.01	3.3 ± 0.2
Scn4b KO (n = 31)	86.9 ± 1.7	1.1 ± 0.03	2.6 ± 0.2	1.6 ± 0.1	11.3 ± 0.9	172.2 ± 7.5	0.59 ± 0.01	−56.9 ± 2.9	0.73 ± 0.01	3.2 ± 0.1