part of start stage end stage cranial nerve X vagus nerve ZFA:0000453 zebrafish_anatomy vagal nerve TAO:0000453 CN-X Cranial nerve that innervates gill muscles. Sometimes called a branchiomeric nerve because it innervates derivatives of the branchial arches. This nerve contains sensory axons that carry both somatic and visceral sensory information as well as motor axons from branchiomotor neurons. The root is typically found at either rhombomere 7 or rhombomere 8. cranial nerve gustatory system pharyngula:prim-5 adult