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Figure 7. Normal anatomy of the vestibule. Three-dimensional VR CT image (inferolateral view after dissection of the lateral wall of the vestibule) demonstrates the elliptical recess (ER) posteriorly and the spherical recess (SR) anteriorly, which house the utricle and saccule, respectively. A bony ridge, the vestibular crest (VC), lies between the elliptical and spherical recesses. The vestibular crest divides inferiorly into two limbs that form an inverted V and bound a small depression, the cochlear recess (CR). The cochlear recess houses the blind opening of the cochlear duct.
