Fig. 6.

Voltage-activated Ca²⁺ currents in E8 and E11 LMNs. A, Representative current traces in control and Ca²⁺-free saline. Total Ca²⁺ currents were obtained by digital subtraction (control, Ca²⁺-free), with representative examples shown on the right. Currents were evoked after a 250 msec step to +30 mV from a holding potential of −40 mV (left, bottom trace). B, Data compiled from many cells indicate no change in mean Ca²⁺ current density between E8 and E11.