Representative images showing caspase-3/7 activation in adult dorsal root ganglia neurons over 60 min of lidocaine exposure. (A) Control cells (without lidocaine treatment) show no new caspase activation over time. (B) 20 mm and (C) 60 mm lidocaine treatment increases caspase-3/7 activation over 60 min. The included scale bar represents 20 µm.