part of part of in taxon extends_fibers_into Tetrapoda Amphibia system nerve accessory XI nerve http://upload.wikimedia.org/wikipedia/commons/5/5e/Gray791.png spinal part of accessory nerve Cranial nerves XI and XII evolved in the common ancestor to amniotes (non-amphibian tetrapods) thus totalling twelve pairs.[well established][VHOG] pars spinalis nervus accessorius CN-XI radix spinalis nervus accessorius BAMS:11n nervus accessorius [XI] XAO:0004214 EMAPA:17265 MBA:717 MA:0001088 accessory nerve [XI] eleventh cranial nerve AAO:0010476 cranial nerve XI FMA:80284 accessory nerve UBERON:0002019 Cranial nerve that innervates the sternocleidomastoid and trapezius complex of muscles. [Bemis_WE, Functional_Anatomy_of_the_Vertebrates:_An_Evolutionary_Perspective, Glossary_G-1, Grande_L, Liem_KF, Third_Edition_(2001)_Orlando_Fla.:_Harcourt_College_Publishers, Walker_WF][VHOG] cervical accessory nerve NCIT:C32041 UMLS:C0000905 In mice, the spinal branch of this motor nerve innervates the trapezius and the sternocleidomastoid muscles. The cranial branch joins the vagus nerve and innervates the same targets as the vagus nerve VHOG:0000699 spinal accessory nerve Wikipedia:Spinal_accessory_nerve MESH:D000055 GAID:825 Small motor nerve which innervates a single pectoral suspensory muscle, the m. cucullaris.[AAO] accessory XI FMA has distinct cranial and spinal parts - WP says 'Traditional descriptions of the accessory nerve divide it into two parts: a spinal part and a cranial part.[1] However, because the cranial component rapidly joins the vagus nerve, becoming an integral part of said nerve, modern descriptions often consider the cranial component to be part of the vagus nerve and not part of the accessory nerve proper.[2] A cranial nerve that originates from neurons in the medulla and in the cervical spinal cord. SCTID:362469008 accessory XI nerve accessory spinal nerve EHDAA:2855 A small motor nerve which emerges from the lateral wall of the medulla with the roots of the vagus nerve, and innervates a single pectoral suspensory muscle, the m.cucullaris. FMA:6720 Willis' nerve spinal accessory nerve tree neuronames:2085 BIRNLEX:812 UMLS:C1305777 BAMS:XIn EHDAA2:0000106 accessory XI nerve nucleus laryngeal nerve