Pain is defined by the International Association for the Study of Pain (IASP) as ?an unpleasant sensory and emotional experience associated with actual or potential tissue damage, or described in terms of such damage?. Pain is frequently the result of nociception;[LINK: http://www.iasp-pain.org/AM/Template.cfm?Section=General_Resource_Links&Template=/CM/HTMLDisplay.cfm&ContentID=3058] IASP Pain Terminology activity in the nervous system that results from the stimulation of nociceptors. This activity is carried to the brain, usually via the spinal cord, and conveys information, without conscious awareness, about damage or near-damage in body tissues. Pain is the conscious experience of sensorial information and a feeling of unpleasantness that can manifest as a result of nociception.Neuropathic pain differs from nociceptive pain in that it involves damage to the nerve resulting in the sensation o