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View Highest Resolution-Slide 206
Excellent view of the Utricle and Saccule and dehiscent Facial (VII) Nerve.  Dehiscence of the Facial Nerve is a frequent finding.  The most common area of dehiscence is the undersurface of the horizontal portion of the nerve, next to the Stape's Footplate.  Care should be taken not to in inadvertently  injure this area with otologic picks when performing a stapedectomy.

Click hear to view the Vestibule which contains the Utricle and Saccule.

View Highest Resolution-Slide 226
This slide shows the Vestibule with the Crus Commune which will branch into the Superior Semicircular Canal (shown in slide 216) and the Posterior Semicircular Canal (shown in slide 236).

Diagram:  V: Vestibule; CC: Crus Commune; S: Stapes; VII: Facial Nerve; HSCC: Horizontal Semicircular Canal; S: Stapes; I: Incus; M: Malleus; TM: Tympanic Membrane (ear drum); IAC:  Internal Auditory Canal and VIII (Vestibulocochlear) Nerve; EAC:  External Auditory Canal; Cochlea; Mastoid Air Cells

View Highest Resolution-Slide 276

Diagram:  PSCC: Posterior Semicircular Canal; CC: Crus Commune; HSCC: Horizontal Semicircular Canal;  V: Vestibule; VII:  Facial Nerve; C: Cochlea; IAC: Internal Auditory Canal and VIII (Vestibulocochlear) Nerve; CA: Carotid Artery, EAC: External Auditory Canal; Stapes; Malleus; Mastoid Air Cells.

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