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Published online by Cambridge University Press: 01 September 1997
Neuroplastic changes in the inhibitory systems contribute to pathological pains such as hyperalgesia. Activation or inhibition of the intrinsic inhibitory systems may depend on the pathophysiology which induces a sustained pain state. The mechanisms of hyperalgesia, opioid insensitivity following nerve injury, and opioid tolerance may be related to common neuroplastic changes. [wiesenfeld-hallin et al.]