AIM: To study the effect of aconitine, an inhibitory blocker of inactivation gate of sodium channel, on the background firing with different patterns originating from injured dorsal root ganglion (DRG) neurons. METHODS: Ectopic spontaneous discharges originating from chronic compressed DRG neurons were recorded through single dorsal root fiber. The transformation and characteristics of interspike interval (ISI) series of firing induced by aconitine of type A neurons were observed and analyzed. (RESULTS:) It...