See video on Navigating The Temporal Bone @ YouTube
Green arrow- Tensor Tympani Tendon, Red Arrow- Stapedius tendon,
1- Processus Cochleariformis, 2- Pyramid, 3- Medial end of Long Process of Incus, 4- Handle of Malleus, 5- Eustachian Tube Opening, 6- Round Window Niche
The promontory (P) where the Jacobson's nerve located and round window niche (rectangle) where cochleostomy made for insertion of cochlear implant electrode. (Arrow - incudostapedial joint)
Dehiscence facial nerve involving its horizontal segment in the middle ear (arrow).
Arrow show the Eustachium tube exit at anterior hypotympanum.
Another image showing Eustachian tube exit (arrow).
Watch video on the hypotympanum of middle ear cavity @ YouTube
Middle ear as seen just beyond the tympanic annulus showing the opened horizontal and descending segment of left facial canal.
[P- promontory, yellow arrow- capitulum of stapes head,
red arrow- round window niche, stars facial tunnel]
Prussak's space is important in the pathogenesis of primary acquired cholesteatoma formation. It is a recess in the middle ear bounded by pars flaccida laterally, neck of malleus medially, lateral process of malleus inferiorly,
and lateral malleolar fold superiorly.
Figure shows a retraction pocket with atelectatic Prussak's space (circle)
and resorption of scutum. The head lf malleus is not seen
as it resides in the epitympanum.
Watch video of clean attic retraction pocket @ YouTube