Table 2.
Properties of group I and II neurons in control conditions
| Group I | Group II | P Values | |
|---|---|---|---|
| n | 36 | 28 | |
| Number of APs | 1 | 6.5 | <0.0001 |
| Rheobase current, pA | 229.3 ± 16.2 | 112.9 ± 9.8 | <0.0001 |
| AP threshold, mV | −20.8 ± 1.4 | −25.5 ± 1.2 | 0.018 |
| AP peak, mV | 44.8 ± 1.4 | 45.9 ± 1.4 | 0.579 |
| AP duration, ms | 1.2 ± 0.1 | 0.9 ± 0.0 | <0.0001 |
| Maximum rate of depolarization, mV/ms | 140.8 ± 6.4 | 156.5 ± 6.1 | 0.041 |
| Maximum rate of repolarization, mV/ms | 53.1 ± 4.3 | 80.1 ± 3.6 | <0.0001 |
| AHP peak, mV | −47.6 ± 1.6 | −50.3 ± 1.6 | 0.255 |
Values are means± SE (n = no. of neurons) with the exception of the number of action potentials (APs), which are median values. Parameters were compared using independent sample t-tests, except for the number of APs, where a Kolmogorov-Smirnov Z-test was used. P values are given for group I vs. group II. AHP, afterhyperpolarization potential.