Dissection of left ear from superior aspect

Tympanic membrane

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Image #61-7

Dissection of left ear from superior aspect

Tympanic membrane

1. Facial nerve (VII)
2. Capitulum of stapes
3. Vestibule (opened)
4. Superior pyramidal angle
5. Vestibulocochlear nerve (vestibular part)
6. Vestibulocochlear nerve (cochlear part)
7. Osseous spiral lamina
8. Modiolus: Upper pointer indicates scala vestibuli of middle turn; lower pointer indicates scala tympani of apical turn)
9. Upper pointer: Tendon of tensor tympani muscle Lower pointer: Manubrium of malleus
10. Major superficial petrosal nerve
11. Minor superficial petrosal nerve
12. Internal carotid artery within carotid canal
13. Outer surface of auditory tube (Eustachian)
14. Middle meningeal artery and mandibular nerve
15. Incus
16. Upper pointer: Incus-malleolar articulation Lower pointer: Malleus
17. Flaccid part of tympanic membrane
18. Anterior malleolar fold
19. Pars tensa tympanic membrane
20. Upper pointer: Limbus (border) of tympanic membrane Lower pointer: Jugular walls of tympanum
21. Chorda tympani
22. Capitulum condyloid process of mandible