Table 1.
Effects of fear conditioning on basic membrane and AP properties of LA neurons.
| Group | n (N) | RMP (mV) | RN (MΩ) | AP properties | |
|---|---|---|---|---|---|
| Amplitude (mV) | Halfwidth (ms) | ||||
| Naive | 68 (14) | −61.5 ± 0.7 | 221.5 ± 6.7 | 66.8 ± 1.2 | 1.1 ± 0.02 |
| CS-alone | 33 (5) | −62.1 ± 0.8 | 217.4 ± 10.9 | 69.6 ± 1.5 | 1.2 ± 0.02 |
| Poor learners | 32 (4) | −61.7 ± 1.06 | 219.5 ± 15.8 | 68.4 ± 1.9 | 1.1 ± 0.04 |
| IS | 42 (5) | −59.7 ± 0.9 | 210.6 ± 10.3 | 69.2 ± 1.2 | 1.3 ± 0.33 |
| Cond-1 h | 58 (9) | −60.4 ± 0.9 | 214.9 ± 8.7 | 66.7 ± 1.6 | 1.1 ± 0.02 |
| Cond-24 h | 70 (10) | −60.3 ± 0.7 | 205.6 ± 7.5 | 67.3 ± 1.0 | 1.1 ± 0.02 |
| Cond-4d | 26 (6) | −59.6 ± 1.2 | 200.6 ± 9.7 | 67.3 ± 1.7 | 1.1 ± 0.03 |
| Cond-10d | 14 (4) | −62.8 ± 0.9 | 219.9 ± 15.0 | 68.6 ± 2.0 | 1.2 ± 0.08 |
Data are presented as the mean ± SE. AP properties were measured from threshold. n, number of cells; N, number of animals; RMP, resting membrane potential; RN, input resistance; AP, action potential; IS, immediate shock.