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The pathogenesis of pain sensation includes mechanisms that result in acute or chronic pain. Pain itself is described as an unpleasant sensory and emotional experience beginning with a peripheral stimulus that undergoes a physiological process ultimately resulting in the sensation of pain. Biologists recognize pain to be a common sign of potential tissue damage. Hence, pain sensation is protective in function. However, pathologic states of pain exist secondary to disruption of the nociceptive process both peripherally and centrally or secondary to psychological conditions. It is essential to identify these aberrant states of pain and distinguish them from situations of potential tissue damage. Chronic pain is defined as pain that exceeds 3 or 6 months duration. This article is an overview of the essential neuroanatomy and neurophysiology of normal pain nociception, its clinical implications, and the development of persistent and pathological pain conditions following improperly or poorly treated pain.
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| http://dx.doi.org/10.1016/j.spen.2016.10.003 | DOI Listing |
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