extends_fibers_into accessory XI nerve nerve root accessory nerve root UBERON:0014615 cranial accessory nerve DMBA:17749 DHBA:12883 BIRNLEX:1580 accessory portion of spinal accessory nerve bulbar accessory nerve cranial part of the accessory nerve root of accessory nerve A nerve root that is part of a accessory XI nerve. cranial part of accessory nerve BAMS:c11n SCTID:280187004 Wikipedia:Cranial_root_of_accessory_nerves bulbar part of accessory nerve nerve XI (cranialis) HBA:9340 cranial portion of eleventh cranial nerve internal branch of accessory nerve