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Spiral limbus
The spiral limbus is a bony part of the ear.
The osseous spiral lamina consists of two plates of bone, and between these are the canals for the transmission of the filaments of the acoustic nerve. On the upper plate of that part of the lamina which is outside the vestibular membrane, the periosteum is thickened to form the limbus spiralis (or limbus laminæ spiralis). It 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 page 1055 of the 20th edition of Gray's Anatomy (1918)
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Spiral limbus
The spiral limbus is a bony part of the ear.
The osseous spiral lamina consists of two plates of bone, and between these are the canals for the transmission of the filaments of the acoustic nerve. On the upper plate of that part of the lamina which is outside the vestibular membrane, the periosteum is thickened to form the limbus spiralis (or limbus laminæ spiralis). It 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 page 1055 of the 20th edition of Gray's Anatomy (1918)