title: The puzzle of pain.
mesh_terms: D000339:Affect; D000818:Animals; D001007:Anxiety; D005239:Fear; D006801:Humans; D006990:Hypnosis; D007031:Hypothalamus / Q000502:physiology; D007062:Identification, Psychological; D009411:Nerve Endings / Q000502:physiology; D009413:Nerve Fibers, Myelinated / Q000502:physiology; D010146:Pain; D010465:Perception; D010525:Peripheral Nerves / Q000502:physiology; D011589:Psychology, Experimental; D011592:Psychology, Military; D012677:Sensation; D012879:Skin Physiological Phenomena; D013116:Spinal Cord / Q000502:physiology; D013788:Thalamus / Q000502:physiology