This document discusses the anatomy of the ear. It describes the external, middle, and inner ear structures. The external ear includes the auricle, lobule, and external auditory meatus leading to the eardrum. The middle ear contains the ossicles (malleus, incus, stapes), muscles (tensor tympani and stapedius), nerves (tympanic plexus and chorda tympani), and the pharyngotympanic tube. The inner ear houses the bony and membranous labyrinths including the cochlea, vestibule, and semicircular canals. Sound is transmitted through the tympanic membrane, ossicles, oval window

1. THE EAR
(Page 154)
Dr.Sherif Fahmy

2. A- External Ear
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3. Dr.Sherif Fahmy

4. Auricle
Lobule
External auditory meatus
Ear drum
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5. Auricle
Lobule of ear
External auditory
meatus
Ear drum
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6. Tympanic memebrane
(Ear drum)
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7. Tympanic
membrane
External
auditory meatus
Malleus
Middle earDr.Sherif Fahmy

8. Pars tensa
Pars flaccida
Cone of light
Handle of
malleus
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9. Tympanic
membrane
Malleus
Middle ear
Umbo
Handle of
malleus
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10. Blood & Nerve Supply of Tympanic
Membrane
• 1- Nerve Supply:
• A- Outer surface: is supplied by auriculo-
temporal and auricular branch of vagus.
• B- Inner surface: tympanic plexus.
• 2- Blood Supply:
• 1- Outer surface: deep auricular artery.
• 2- Inner surface: from anterior tympanic
artery.
Dr.Sherif Fahmy

11. Dr.Sherif Fahmy

12. Outer
aspect of
tymoanic
membrane
Handle of
malleus
Cone of light Dr.Sherif Fahmy

13. Otitis
media
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14. B- Middle Ear
(Page 156)
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15. Epitympanic recess
Tympanic cavity
Parts of middle ear cavity
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16. Roof
Floor
Anterior
wall
Posterior
wall
Medial wall
Walls of middle ear
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17. Tegmen
tympani
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18. Roof
Tegman tympani
Floor
Int. jugular vein
Tympanic br. Of
Glosso-
pharyngeal n.
Roof & Floor
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19. Anterior
wall
Posterior
wall
Promontory
Tympanic
plexus
Oval
window
Round
window
Br. From sympathetic
plexus around I.C.A.
Tympanic br. Of 9th
CN
Canal for facial N. Medial wall
Dr.Sherif Fahmy

20. Roof
Floor
Anterior
wall
Posterior
wall
Tensor tympani m.
Auditory
tube
Internal
carotid art.
Sympathetic
plexus
Anterior wall
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21. Aditus ad
antrum
Pyramid
Facial canal
Chorda
tympani
Posterior wall
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22. External auditory
meatus
Ear drum
Lateral wall
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23. Contents of middle ear
1- Ossicles: Malleus, incus and stapes.
2- Muscles: Tensor tympani & Stapedius.
3- Nerves: Tympanic plexus and chorda
tympani.
4- Blood vessels: Tympanic arteries.
Dr.Sherif Fahmy

24. Malleus
Middle ear
Incus
Stapes
Ossicles
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25. Malleus
Incus
Stapes
Ossicles Head
Handle
Body
Long process
Head
Neck
Limbs
Foot plate
Short process
Anterior process
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26. Pharyngo-tympanic tube
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27. Middle ear
Lateral wall
of naso-
pharynx
Pharyngo-
tympanic tube
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28. Dr.Sherif Fahmy

29. Opening of
pharyngeotympanic
tube
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30. Inner Ear
(Page 160)
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31. Internal acoustic
meatus
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32. Petrous Semicircular
canals
Vestibule
Cochlea
Bony labyrinith
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33. saccule
Utricle
Cochlear duct
Semicircular ducts
Endolymphatic duct
Membranous
labrynith
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34. Vestibulo-cochlear
Nerve
(Page 160)
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35. Vestibular
nerve
Cochlear
nerve
Internal
auditory
meatus
Vestibulo-
cochlear nerve
Dr.Sherif Fahmy

36. Vestibular
ganglia
Vestibular nerve
Spiral ganglia
Cochlear nerve
Vestibulo-
cochlear
nerve
Internal
auditory
meatus
Ponto-
cerebellar
angle
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37. Transmission of sound
Tympanic membrane
Malleus
Incus
Stapes
Oval
window
Round window closed with 2dry tympanic
membrane
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38. Spiral
gangliom
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39. Applied Anatomy
1- Otitis media.
2- Intracranial injury of facial n.
-At internal auditory meatus.
-At medial wall of middle ear.
3- High tone deafness.
Dr.Sherif Fahmy