Total length of dendrites (A), and surfaces of somata (B) of CA1 area interneurons. A,PV cells have the longest total dendritic length, and CR cells have the shortest. However, as indicated by the small open squares representing the length of individual dendrites, there was a high variability among individual cells within a group. Only the length of CR dendrites showed significant (p< 0.05) difference from the other two cell populations.B, As for the total dendritic lengths, the soma surface was largest for PV cells and smallest for CR cells with considerable variance. The values are given in square micrometers. The differences among the groups were significant (n = 20;p < 0.05).