Through interesting animated visuals, this introductory video concisely explains the physiology of pain. It not only overviews Pain pathway and nociceptors but also different types of pain. Timeline: 00:02 introduction 00:15 Pain pathway and nociceptors 01:33 the spinothalamic tract 01:55 spinoreticular tract 02:24 somatic and visceral pain 02:36 referred pain