Fibromyalgia (FM) is a complex syndrome characterized by chronic widespread pain, hyperalgesia, and other disabling symptoms. While the brain response to experimental pain in FM patients has been the object of intense investigation, the biological underpinnings of painful after-sensations (PAS), and their relation to negative affect have received little attention. In this cross-sectional cohort study, subjects with FM (n=53) and healthy controls (n=17) were assessed for PAS by exposure to a sustained, moderately painful cuff stimulus to the leg, individually calibrated to a target pain intensity of 40/100.
from The Journal of Pain http://ift.tt/2nsLt07
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