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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.

Inner_Ear_Histopathology_206.jpg (578498 bytes)
View Highest Resolution-Slide 216 Inner_Ear_Histopathology_216.jpg (598019 bytes)
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).
Close Up of VII Nerve, Cochlea and Vestibule   Graph of Close Up View of VII, Cochlea and Vestibule

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

Inner_Ear_Histopathology_226.jpg (527196 bytes)
View Highest Resolution-Slide 236
Excellent view of Utricle, Saccule and Organ of Corti.  Dehiscent VII Nerve next to Stapes Footplate.  
Inner_Ear_Histopathology_236.jpg (547213 bytes)
View Highest Resolution-Slide 246

For information about Stapedectomy Go To: http://www.entusa.com/stapedectomy.htm

Inner_Ear_Histopathology_246.jpg (551723 bytes)
View Highest Resolution-Slide 256 Inner_Ear_Histopathology_256.jpg (608281 bytes)
View Highest Resolution-Slide 266 Inner_Ear_Histopathology_266.jpg (546699 bytes)
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.

Inner Ear Histopathology 276.jpg (491312 bytes)
View Highest Resolution-Slide 286 Inner_Ear_Histopathology_286.jpg (463895 bytes)
View Highest Resolution-Slide 296 Inner_Ear_Histopathology_296.jpg (490512 bytes)

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