TABLE 1.Intrinsic properties of olfactory tubercle neurons
|
|
|||||
| Regular Spiking | Intermittent Firing | Bursting (total) | Bursting Regenerative | Bursting Non-Regen. | |
|
|
|||||
| n | 36 | 32 | 98 | 21 | 77 |
| Percentage in DCL | 82.6 | 8.7 | 8.7 | 0 | 8.7 |
| Percentage in MFL | 12.6 | 21.5 | 65.9 | 12.6 | 53.3 |
| RMP, mV | –69.5 ± 3.6 | –65.1 ± 2.0 | –62.2 ± 1.1a | –62.9 ± 2.9 | –62.1 ± 1.3 |
| Rin, MΩ | 281.4 ± 52.9 | 250.2 ± 37.7 | 248.6 ± 15.4 | 242.1 ± 25.8 | 251.0 ± 19.1 |
| tau, ms | 32.0 ± 5.3 | 25.6 ± 2.0 | 27.0 ± 1.5 | 31.4 ± 3.0 | 25.4 ± 1.6 |
| AP amplitude, mV | 61.4 ± 3.0 | 68.7 ± 2.6 | 63.4 ± 1.4 | 60.9 ± 1.8 | 64.6 ± 1.8 |
| AP width, ms | 2.12 ± 0.04 | 2.05 ± 0.06 | 2.13 ± 0.02 | 2.05 ± 0.06 | 2.17 ± 0.02e |
| AP threshold, mV | –34.6 ± 1.9 | –39.4 ± 1.2a | –39.2 ± 0.6a | –38.7 ± 1.3 | –39.5 ± 0.7 |
| AHP amplitude, mV | –11.7 ± 1.6 | –11.7 ± 0.9 | –7.8 ± 0.6b,c | –7.5 ± 1.6 | –8.0 ± 0.5 |
| AHP peak time, ms | 8.7 ± 0.9 | 9.3 ± 1.3 | 9.4 ± 0.7 | 7.3 ± 1.0 | 10.3 ± 0.8e |
| Initial clustering | 0.30 ± 0.01 | 0.45 ± 0.05a | 0.88 ± 0.02b,d | 0.79 ± 0.06 | 0.92 ± 0.02f |
| Firing CV | 0.18 ± 0.02 | 0.59 ± 0.09b | 0.52 ± 0.03b | 0.62 ± 0.08 | 0.49 ± 0.03 |
| Sag, % | 42.9 | 38.9 | 80.8 | 71.4 | 84.2 |
Values are means±SE. DCL, dense cell layer; MFL, multiform layer; RMP, resting membrane potential; AP, action potential; AHP,
after hyperpolarization.
a and b Significantly different from regular spiking P < 0.05 (a) and P < 0.001 (b);
c and d significantly different from intermittant P < 0.05 (e) and P < 0.001 (d);
e and f significantly different from regenerative burst P < 0.05 (e) and P < 0.01 (f).