Perioperative Nerve Blockade: Clues from the Bench

Figure 1

Schematic of the major animal models of nerve injury. Rhizotomy consists of section of dorsal roots; SNL: spinal nerve ligation, usually L5 or L5 and L6; CCI: chronic constriction injury consists of loose ligations of the sciatic nerve; SNI: spared nerve injury, consists of section of the tibial and the peroneal branches leaving the sural intact.