Sulcus spiralis internus

Sulcus spiralis internus
Floor of ductus cochlearis.
Details
Latin	Sulcus spiralis internus
Dorlands /Elsevier	s_28/12769910
Anatomical terminology []

On the upper plate of that part of the lamina which is outside the vestibular membrane, the periosteum is thickened to form the spiral limbus, this ends externally in a concavity, the sulcus spiralis internus, which represents, on section, the form of the letter C.

This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)