Table 1.

Mean values for branch points and terminations per cell in all cortical layers in standard media and TTX

Standard media (24) TTX (25)
Branch pointsTerminationsBranch pointsTerminations
Layer 66.2  ± 0.63.7  ± 0.53.8  ± 0.41.3  ± 0.3
Layer 51.1  ± 0.40.8  ± 0.31.5  ± 0.30.8  ± 0.2
Layer 4 ed2.2  ± 0.5*2.6  ± 0.5**1.4  ± 0.4 ns1.5  ± 0.5 ns
Layers 2-44.0  ± 0.95.4  ± 1.03.1  ± 0.94.0  ± 0.9
  • Mean (± SE) numbers of branch points and terminations per cell for all cells (n) labeled in cultures grown in standard media with or without 1 μm TTX. Slices were cultured on P14–P15 and incubated for 5-7 d before cells were labeled. Values in layer 5 and layer 4 equivalent distance (ed) were compared for each cell, and the significance was evaluated for the population (Wilcoxon signed rank test). Asterisks represent values that were significantly higher in layer 4 ed vs. layer 5 levels. ns, No significant difference.

  • *p < 0.05.

  • **p < 0.01.