Table 1.
Comparison of the intrinsic electrophysiological properties and location of 4-AP-/TEA-sensitive and insensitive neurones within the NTS
| Parameter | 4-AP-/TEA-responsive (n = 81) | Unresponsive (n = 16) | Level of significance |
|---|---|---|---|
| Location | Ventral/ventrolateral NTS | Commissural NTS | NA |
| RMP (mV) | 69.5 ± 3.8 | 66.3 ± 5.7 | n.s. |
| Input resistance (MΩ) | 789 ± 96 | 954 ± 104 | n.s. |
| Action potential duration (ms) | 4.4 ± 1.2 | 7.2 ± 1.7 | P < 0.05 |
| AHP amplitude (mV) | 16.1 ± 2.2 | 11.3 ± 2.7 | P < 0.05 |
| FFINST (Hz) | 66.9 ± 5.3 | 38.4 ± 4.3 | P < 0.05 |
| Early accommodation (%) | 32.4 ± 3.3 | 39 ± 5.3 | n.s. |
| Late accommodation (%) | 1.9 ± 0.2% | 12.7 ± 2.3% | P < 0.05 |
NA, not applicable; NTS, nucleus tractus solitarii; RMP, resting membrane potential; AHP, afterhyperpolarization; FFINST.