Table 2.
Physiology and serotonergic responsiveness of L2/3PNs.
| Neuron subtype | n | VM (mV) | RN (MΩ) | % sag |
|---|---|---|---|---|
| NON-LABELED L2/3PNs (IN COM-LABELED TISSUE) | ||||
| Inhibited | 12 | −79 ± 2 | 144 ± 14 | 5 ± 1 |
| Excited | 6 | −79 ± 1 | 147 ± 16 | 5 ± 1 |
| Total L2/3 Non-COM | 18 | −80 ± 2 | 142 ± 10 | 5 ± 1 |
| COM L2/3PNs | ||||
| Excited | 11 | −79 ± 1 | 171 ± 10 | 5 ± 1 |
| Biphasic | 7 | −79 ± 2 | 180 ± 14 | 5 ± 1 |
| No response | 3 | −78 ± 2 | 218 ± 43 | 7 ± 3 |
| Total L2/3 COM | 21 | −79 ± 1 | 181 ± 9* | 5 ± 1 |
Physiological properties measured include membrane potential (VM), input resistance (RN), and “sag” rectification during responses to hyperpolarizing current injections. Data reported as mean ± SEM. Summary data for all unlabeled or COM-labeled neurons (independent of 5-HT responses) are highlighted. COM-labeled and unlabeled L2/3PNs were similar in most regards, with the exception of RN, which was significantly higher in COM-labeled neurons (bold with asterisk; Student's t-test, p < 0.05).