internal branch of trunk of accessory nerve
Definition: branch formerly considered to arise from the accessory nerve trunk that carries fibers from the cranial root and that unites with the vagus nerve in the jugular foramen. Currently this branch is considered the inferiormost root of the vagus nerve.
Synonym(s): ramus internus trunci nervi accessoriiTA, internal ramus of accessory nerve
See Also: accessory nerve [CN XI]