<prompt> Which one of the following is the description used for the term allodynia?Absence of pain perceptionComplete lack of pain sensationUnpleasant sensation with or without a stimulusPerception of an ordinarily non noxious stimulus as severe pain  <response>: Allodynia refers to central pain sensitization increased response of neurons following normally non-painful, often repetitive, stimulation. Allodynia can lead to the triggering of a pain response from stimuli which do not normally provoke pain.Ref: Ganong;s review of medical physiology, 23rd edition, Page no:168 