Table 1.
Summary of biophysical/electrophysiological parameters for populations of inspiratory XII preMNs and MNs
| Parameter | XII preMNs | XII MNs |
|---|---|---|
| Resting membrane potential (mV) | −59.2 ± 4.8 | −62.4 ± 4.6 |
| Action potential amplitude (mV) | 88.6 ± 6.4 | 89.2 ± 5.8 |
| Action potential duration (ms) | 1.42 ± 0.12 | 1.44 ± 0.16 |
| mAHP amplitude (mV) | 4.2 ± 2.0 | 4.8 ± 2.4 |
| mAHP duration (ms) | 90.0 ± 29.0 | 99.0 ± 36.0 |
| mAHP half-duration (ms) | 31.6 ± 9.4 | 35.2 ± 10.2 |
| Cm (pF)a | 32.1 ± 2.3 | 63.4 ± 2.1* |
| gNaP (nS)a | 1.26 ± 0.34 | 2.52 ± 0.60* |
| NaP g/gmax:V1/2max(mV)a | −47.2 ± 3.2 | −47.6 ± 3.0 |
| Boltzmann slope factor (k)a | 4.9 ± 0.2 | 5.0 ± 0.2 |
| gLeak (nS)a | 4.14 ± 1.57 | 9.36 ± 3.00* |
| Rm (MΩ ) | 227.0 ± 63.7 | 107.1 ± 33.0* |
| Ratio: gNaP/gLeaka | 0.33 ± 0.10 | 0.29 ± 0.09 |
| Peak synaptic current Isyn (pA) | 122.0 ± 39.0 | 229.0 ± 87.0* |
| Isyn/Cm (pA/pF) | 3.81 ± 1.21 | 3.61 ± 1.37 |
Values represent means ± SD.
For populations of XII preMNs, n = 16 or a20, and for XII MNs, n = 16 or a20.
*p < 0.01, parameters were significantly different. All other parameters were not statistically different (p > 0.05) between preMNs and MNs.