Example image of eyePlorer eyePlorer map for 'Referred pain': Ischemia Myocardial infarction International Association for the Study of Pain Physician Mechanism (biology) Summation (neurophysiology) Anatomical terms of location Spinal cord Brainstem Posterior horn of spinal cord Functional magnetic resonance imaging PET Capsaicin Serotonin Substance P Saline (medicine) Intramuscular injection Ischaemic heart disease Ketamine Fibromyalgia Aaron's sign Ice-cream headache Levine's sign Posterior Rami Syndrome Allodynia Myofascial pain syndrome Toothache Trigger point Kehr's sign Pain management Radiculopathy Mesentery Tonsillitis Nasopharyngeal carcinoma Angina pectoris Phrenic nerve Neck pain Viscus OPQRST Side stitch Epididymitis Legg–Calvé–Perthes syndrome Temporomandibular joint disorder Parasympathetic nervous system Nerve Niles Crane Peptic ulcer Pain