# Sulcus Limitans

National Cancer Institute

## Source

National Cancer Institute. *Sulcus Limitans*. NCI Thesaurus. Code C33656.

A groove running rostrocaudally the length of the floor of the fourth ventricle on either side of the midline that separates structures derived from the basal plate (cranial nerve motor nuclei) from those derived from the alar plate (cranial nerve sensory nuclei).