Bassett Collection of Stereoscopic Images of Human Anatomy

Dissection of left ear from superior aspect

Relations of tympanic cavity, facial canal and vestibule

Image #61-6

KEYWORDS: Bones cartilage joints, Ear.

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Dissection of left ear from superior aspect
Relations of tympanic cavity, facial canal and vestibule
The lateral semicircular canal has been cut away and the vestibule widely opened. The facial canal has been opened and it course above the posterior part of the tympanic cavity shown.
1 . Stapedius nerve and muscle
2 . Tympanic sinus
3 . Facial nerve (VII) (within facial canal)
4 . Vestibule
5 . Vestibulocochlear nerve (VIII) (vestibular part) (superior and inferior branches)
6 . Internal acoustic meatus
7 . Vestibulocochlear nerve (VIII) (cochlear part)
8 . Modiolus
9 . Upper pointer: Central end of facial nerve (Vll) (cut off) Lower pointer: Geniculate ganglion
10 . Upper pointer: Tendon of tensor tympani muscle Lower pointer: Tympanic membrane
11 . Major superficial petrosal nerve
12 . Minor superficial petrosal nerve
13 . Chorda tympani
14 . Internal carotid artery
15 . Middle meningeal artery
16 . Otic ganglion
17 . Mandibular nerve (V)
18 . Tympanic antrum
19 . Short crus of incus
20 . External acoustic meatus (note transition from thick to thin skin at junction of cartilaginous and bony parts of wall of meatus)
21 . Upper pointer: Manubrium of malleus Lower pointer: Capitulum of malleus
22 . Veins of external auditory meatus tributary to posterior facial vein
23 . Articular disc
24 . Capitulum (condylar process) of mandible
25 . External pterygoid muscle
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