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Dorsal root ganglion (DRG) neurons are the first-order sensory neurons of the spinal somatosensory system.Based on the vital role of DRG neurons in pain signal initiation and transduction, direct manipulation of function of DRG neuron soma body is a valuable way to help understand the pain mechanism.In this study, a new method of targeted delivery of pharmacological agents into DRG was constructed.Briefly, a midline incision was made at the L4-L6 spinal level at rat and the L5 was identified.