part of part of extends_fibers_into Homo sapiens system spinal nerve nerve plexus spinal nerve plexus SCTID:42280003 EHDAA2:0001899 An intermingling of fiber fascicles from adjacent spinal nerves to form a network. spinal nerve plexus EMAPA:16987 MA:0000235 plexus of spinal nerves UMLS:C0228603 somatic nerve plexus NCIT:C49601 VHOG:0000925 UBERON:0001813 To reach the muscles, dermatomes, and other structures of the limbs, some of the neurons in the spinal nerves come together in the plexus at the base of the limb. Such plexuses occur in all gnathostomes, and they reach their highest complexity among mammals and birds in which the cervical plexus supplies many ventral neck muscles, the brachial plexus supplies the pectoral appendage, a lumbosacral plexus supplies the pelvic appendage, and a coccygeal plexus supplies some of the pelvic muscles.[well established][VHOG] plexus nervorum spinalium FMA:5903