Table 1.
Morphometric values from biocytin-stained CA1 pyramidal cells of newborn rats
| Silent (n = 18) | GABA (n = 13) | GABA + NMDA (n = 3) | GABA + NMDA + AMPA (n = 9) | |
|---|---|---|---|---|
| Soma size (μm2) | 143 ± 11 | 247 ± 34** | 224 ± 31 | 243 ± 27** |
| Total dendritic length (μm) | 97 ± 28 | 307 ± 79* | 880 ± 198 | 829 ± 190***, ***** |
| Total branching points | 1.2 ± 0.4 | 4.6 ± 1* | 12 ± 4 | 9 ± 1**, **** |
| Spines/neuron | 0 | 0.7 ± 0.3* | 2 ± 2 | 3.4 ± 1***, **** |
| Apical dendrites | ||||
| Branching points | 1.1 ± 1 | 4.2 ± 1* | 8 ± 2 | 6.5 ± 1*** |
| Length in radiatum (μm) | 29 ± 11 | 239 ± 68** | 438 ± 135 | 421 ± 119*** |
| Length in lacunosum-moleculare (μm) | 0 | 0 | 139 ± 48 | 177 ± 53***, ***** |
| Basilar dendrites | ||||
| Branching points | 0 | 0.3 ± 0.1 | 4 ± 2 | 2.8 ± 1**, **** |
| Length (μm) | 0 | 20 ± 13* | 181 ± 96 | 167 ± 54***, ***** |
Mean data (±SEM) were obtained from P0 pyramidal cells injected intracellularly with biocytin as described in Materials and Methods. GABA + NMDA-active cells show similar values than GABA + NMDA + AMPA-active cells, but statistical analysis was not realized because of the limited number of this type of cells.
*p < 0.005; **p < 0.001; ***p < 0.001 when compared with silent cells.
****p < 0.05; *****p < 0.0001 when compared with GABA-active cells.