Examples of intracellular recordings in the isolated whole dorsal root ganglion preparation. (A) An example of spontaneous bursting activity recorded in a cell from a dorsal root ganglion isolated 3 days after local inflammation. (B) Expanded time course showing the subthreshold membrane potential oscillations typically observed in spontaneously active cells. The average membrane potential in between bursts was −52.7 mV. (C) Further expanded time course showing action potentials within a burst. (D) Example of a single action potential from the same cell. The arrow indicates the threshold.