Figure 6. Passive electrophysiological properties of layer 1 interneurons. A, Representative recording of a neuron under successive hyperpolarizing pulses (varying in 10 pA steps). B, Current-voltage (I/V) curve of layer 1 neurons according to dendritic morphotype. Measurements were made for all horizontal (N = 28), radial (N = 41), ascendant (N = 22), and descendant (N = 13) cells. Points were calculated with the mean values obtained for all studied cells in each group. Note that there was no statistically significant segregation between the data sets. C, I/V curve of layer 1 neurons according to sublayer distribution. Measurements were made for all superior (N = 24), medial (N = 47) and inferior (N = 34) cells. Points were calculated with the mean values obtained for all cells studied in each group. Note that there was no statistically significant differences between the data sets.