Sulcus spiralis internus
|Sulcus spiralis internus|
Floor of ductus cochlearis.
|Latin||Sulcus spiralis internus|
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.
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