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Experimental models of peripheral nerve injury have been developed to study mechanisms of neuropathic pain in living animals. The spared nerve injury (SNI) model in rodents is a partial denervation model, in which the common peroneal and tibial nerves are injured, producing consistent and reproducible tactile hypersensitivity in the skin territory of the spared, intact sural nerve. SNI-operated mice require less force applied to the affected limb to elicit a withdrawal behavior as compared to sham mice. This effect is observed as early as 2 days after surgery and lasts for at least 1 month. We describe detailed surgical procedures to establish the SNI mouse model that has been widely used for investigating mechanisms of neuropathic pain.
Cichon et al. (Mon,) studied this question.