Dissection of left ear from superior aspect
Tympanic cavity and labyrinth, superolateral view
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Image #61-3
Dissection of left ear from superior aspect
Tympanic cavity and labyrinth, superolateral view
- Dissected area on posterior aspect of petrous part of temporal bone
- Common crus
- Upper pointer: Subarcuate fossa Lower pointer: Vestibule (membrane of utricle visible)
- Facial nerve (VII)
- Upper (utriculoampullar) division of vestibulocochlear nerve (VIII)
- Cochlea (pointer on modiolus)
- Geniculate ganglion
- Greater superficial petrosal nerve
- Upper pointer: Tendon of tensor tympani muscle Lower pointer: Position of anterior process of malleus
- Lessor superficial petrosal nerve
- Communicating branch between above nerve (10) and plexus along middle meningeal artery
- Middle meningeal artery (cut off)
- Semilunar ganglion (reflected laterally)
- Lateral semicircular canal
- Superior semicircular canal
- Tympanic antrum
- Posterior ligament of incus
- Upper pointer: Long crus of incus Lower pointer: Body incus
- Fold of incus
- Capitulum of malleus
- Lateral margin of tympanic cavity
- Mastoid cells