OtoRhinoLaryngology Portal

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OtoRhinoLaryngology Portal Video Collections

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Middle & Inner Ear Structures Orientations on Temporal Bone Model

See video on Navigating The Temporal Bone @ YouTube

Middle Ear Anatomy

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 & 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)

Facial Nerve Dehiscence - Horizontal Segment

Dehiscence facial nerve involving its horizontal segment in the middle ear (arrow). 

Eustachian Tube: The Bony Segment as Seen Through An Eardrum Perforation


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

Endoscopic Middle Ear Dissection

Facial Nerve Course in a Skull Model

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]

The Prussak's Space

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.


More Info


Watch video of clean attic retraction pocket @ YouTube