<Tr> <Td_colspan="2"> C fiber not labeled, but substantia gelatinosa of Rolando is Rexed lamina II, labeled at upper left . </Td> </Tr> <Tr> <Td_colspan="2"> Anatomical terminology (edit on Wikidata) </Td> </Tr> <P> Group C nerve fibers are one of three classes of nerve fiber in the central nervous system and peripheral nervous system . The C group fibers are unmyelinated and have a small diameter and low conduction velocity . They include postganglionic fibers in the autonomic nervous system (ANS), and nerve fibers at the dorsal roots (IV fiber). These fibers carry sensory information . </P> <P> Damage or injury to nerve fibers causes neuropathic pain . Capsaicin activates C fibre vanilloid receptors, giving chili peppers a hot sensation . </P>

C fibers carry what type of information to the brain