sulcus limitans
Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.
lim·it·ing sul·cus
the medial longitudinal groove on the inner surface of the neural tube separating the alar and basal plates.
Synonym(s): sulcus limitans [TA]
sulcus limitans
A shallow groove running transversely halfway down each inner wall of the neural tube of the embryo. It divides the alar (dorsal, sensory precursor) neural tube cells from the basal (ventral, motor precursor) neural tube cells.
See also: sulcus