Cranial nerve 11, brainstem part

Nervus accessorius, pars cranialis/vagalis

Cranial nerve 11, vagus part

A bundle of nerve fibres emanating from the nucleus ambiguus that is actually intended for the vagus nervus, but which, when it exits the medulla oblongata, runs for a short distance with the spinal cord portion of n.11. The vagus part detaches itself from the spinal cord part on the outside of the skull and finally joins the n.vagus.