The percentage of cells remaining adherent to coverslips after lidocaine treatment decreased in a dose- dependent manner for both adult and postnatal day 7 (P7) dorsal root ganglia (DRG) neurons. Images of four representative fields were taken before and after 10-min lidocaine incubation. Neurons were counted, and the percentage of cells remaining after treatment was determined. n = 3 separate cultures except n = 4 for P7 dead control.