Table 1.
Morphological and electrophysiological properties of layer IV spiny neurons
| Morphological properties | Spiny stellate cells (n = 17) | Pyramidal cells (n = 11) |
|---|---|---|
| Soma area (μm2) | 173 ± 34 | 169 ± 52 |
| Number of primary dendrites | 4.2 ± 1.8 | 4.2 ± 1.1 |
| Number of dendritic ends | 22.4 ± 5.5 | 23.1 ± 4.3 |
| Mean total length of dendrites (μm) | 1992 ± 371 | 2493 ± 741 |
| Mean length of apical dendrite (μm) | 916 ± 384 | |
| Electrophysiological properties | Spiny stellate cells (n = 28) | Pyramidal cells (n = 18) |
| Vrmp (mV) | −66.4 ± 4.0 | −65.9 ± 4.5 |
| Rm(MΩ) | 194 ± 64 | 180 ± 41 |
| Firing pattern | IB, n = 15; RS, n = 13 | IB, n = 10; RS, n = 8 |
| IB first-ISI (msec) | 6.7 ± 0.8 | 6.9 ± 1.0 |
| IB second-ISI (msec) | 13.0 ± 4.2 | 15.7 ± 10.8 |
| RS first-ISI (msec) | 20.8 ± 12.4 | 26.1 ± 4.5 |
| RS second-ISI (msec) | 50.8 ± 10.8 | 49.8 ± 12.5 |
IB, Intrinsically burst spiking; RS, regular spiking; ISI, interspike interval. Data are means ± SD.