Table 1.
Passive and action potential properties of SDH neurons from different spinal regions in neonates and adults
| Spinal cord region (n) | RIN (MΩ) | RMP (mV) | Rheobase current (pA) | AP threshold (mV) | AP height (mV) | AP half-width (ms) | AHP amplitude (mV) | |
|---|---|---|---|---|---|---|---|---|
| Neonate | C2–C4 (101) | 711 ± 41 | −58.4 ± 1.0 | 48 ± 4.0 | −38.3 ± 0.5 | 29.5 ± 1.4 | 2.29 ± 0.1 | −11.5 ± 1.0 |
| T8–T10 (99) | 819 ± 52* | −56.2 ± 1.0* | 48 ± 4.0 | −39.3 ± 0.5 | 29.8 ± 1.5 | 2.47 ± 0.1 | −9.5 ± 0.9 | |
| L3–L5 (101) | 582 ± 29* | −57.2 ± 0.9 | 55 ± 5.3* | −38.4 ± 0.5 | 30.2 ± 1.5 | 2.28 ± 0.1 | −10.4 ± 0.9 | |
| Adult | C2–C4 (109) | 425 ± 20 | −65.7 ± 1.0 | 77 ± 8.3 | −38.3 ± 0.7 | 49.5 ± 1.2 | 0.72 ± 0.02 | −37.1 ± 0.7 |
| T8–T10 (108) | 429 ± 22 | −68.7 ± 1.1 | 107 ± 11 | −39.6 ± 0.5 | 48.5 ± 1.2 | 0.70 ± 0.02 | −36.8 ± 0.7 | |
| L3–L5 (113) | 423 ± 17 | −67.4 ± 1.0 | 89 ± 8.6 | −38.8 ± 0.6 | 47.7 ± 1.3 | 0.90 ± 0.05 | −35.1 ± 0.8 |
All values except AP threshold differ in neonate and adult SDH neurons.
*
Difference across spinal regions (see text for more details).