Thickness of the cerebral wall at which each P/P-division type was observed
| . | n . | Cerebral wall thickness . |
|---|---|---|
| P/P total | 57 | |
| Type I | 13 (23%) | 142±5 μm |
| Type II total | 44 (77%) | 169±6 μm |
| Type IIa | 23 | 142±3 μm |
| Type IIb | 21 | 197±8 μm |
| . | n . | Cerebral wall thickness . |
|---|---|---|
| P/P total | 57 | |
| Type I | 13 (23%) | 142±5 μm |
| Type II total | 44 (77%) | 169±6 μm |
| Type IIa | 23 | 142±3 μm |
| Type IIb | 21 | 197±8 μm |
Fifty-seven P/P divisions (Table 1) were classified according to the behavior of daughter cells(Figs 1 and 2). All values shown are mean±s.e.m. Differences between type I and type II(P<0.05), type IIa and type IIb (P<0.0001), and type I and IIb (P<0.0001) were significant (Mann-Whitney test), but those between between type I and type IIa were not significant.