This is the first comprehensive review of all aspects of nociceptor function, including the structure of nociceptor endings, their neurochemistry, and evolutionary considerations. It deals with the functional properties of nociceptors innervating different organs and the biophysical mechanisms underlaying the transduction process in nociceptors. There are sections on how nociceptor function is modified by nerve injury and regeneration and on its physiopathology.This is an essential reference for researchers in neuroscience and pharmacology, and clinicians working in pain management.