also called pain dissociation; a condition in which pain is perceived, but does not cause suffering. This usually results from injury to the brain, lobotomy, cingulotomy or morphine analgesia. Preexisting lesions of the insula may abolish the aversive quality of painful stimuli while preserving the location and intensity aspects. Typically, patients report that they have pain but are not bothered by it, they recognise the sensation of pain but are mostly or completely immune to suffering from it.
Greek mythology: also Epialos, Epioles or Epialtes - the spirit (daemon) and personification of nightmares.