Synonyms: radix nervi initial segment of nerve
- UMLS:C0228084 (ncithesaurus:Nerve_Root)
We consider cranial nerve roots to be primarily CNS structures, but model spinal nerve roots as PNS structures, due to the existence of ganglia on the roots.
The continuation of the neurite bundle and associated glia of a nerve, inside the central nervous system[FBbt:00007602, FBC:DOS].
FMA has 'central zone of nerve' which is the superclass of cranial nerve tracts, which the FMA sometimes calls roots