Comparison of striatal spiny neurons
| Juvenile | Adult | P | PA | LPO | P | |
|---|---|---|---|---|---|---|
| Resting potential, mV | −72 ± 12 | −67 ± 10 | 0.32 | −70.7 ± 11.6 | −66.3 ± 12.0 | 0.64 |
| Input resistance, MΩ | 314 ± 151† | 435 ± 220 | 0.15 | 300 ± 129 | 614 ± 211 | 0.01* |
| AP threshold, mV | −29.2 ± 7.8 | −28.8 ± 6.1 | 0.90 | −28.1 ± 7.4 | −32.7 ± 5.2 | 0.15 |
| AP amplitude, mV | 45.8 ± 11.3 | 40.4 ± 10.0 | 0.18 | 42.5 ± 9.6 | 43.9 ± 13.4 | 0.70 |
| AP duration, ms | 1.40 ± 0.27 | 1.28 ± 0.29 | 0.37 | 1.25 ± 0.30 | 1.23 ± 0.19 | 0.81 |
| AHP peak, mV | −17.5 ± 5.4 | −18.6 ± 3.2 | 0.58 | −17.7 ± 4.2 | −20.8 ± 2.0 | 0.21 |
| AHP time to peak, ms | 2.73 ± 1.00 | 2.81 ± 1.10 | 0.96 | 2.82 ± 2.30 | 3.46 ± 0.50 | 0.04* |
| Delay to first spike, ms | 406 ± 41 | 374 ± 84 | 0.48 | 389 ± 71 | 393 ± 55 | 0.81 |
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Comparison of electrophysiological parameters of juvenile (younger than 50 days) SNs to adult (older than 80 days) SNs, and paleostriatum augmentatum (PA) SNs to lobus parolfactorius (LPO) SNs. Values are compared with the two-tailed Mann-Whitney test. Values in this table are means ± SD. See methods for definitions of the various parameters presented here. The Pvalue for each comparison is shown to the right of the values compared. † Data from only 9 cells contributed to this measurement. * These comparisons were significant. The number of cells for juvenile, adult, PA, and LPO SNs were 10 cells from 6 birds, 16 cells from 9 birds, 17 cells from 10 birds, and 5 cells from 4 birds, respectively.