Schwann cell (3) producing the myelin sheets around A-fibers. Black spots in the neurite neuroplasm represent microtubules.C-fibers and A-fibers act as nociceptive afferents (adapted from Roques et al, 2010)
(D) Section of the maxillary brand of the trigeminal nerve of rainbow trout showing the presence of A-delta and C-fibers that may act as nociceptors (x1000, scale bar 2 um; adapted from Sneddon, 2002). With permission from Elsevier.