ganglion Any structure containing a collection of nerve cell bodies in the central nervous system (CNS) or peripheral nervous system (PNS). Plural: ganglia. The CNS of many invertebrates consists largely of ganglia, connected by nerve cords, variously arranged but usually well developed in the head (cerebral ganglia). In vertebrates the CNS has a different structure but ganglia occur in the PNS (see nerve root) and autonomic nervous system. A ganglion is also the name of a benign lump, often at the wrist, found close to tendons and containing jelly-like fluid. Related category • ANATOMY AND PHYSIOLOGY Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) |