Anatomy of

Semicircular canals

Helix

Crura ofantihelix

Externalacousticmeatus -

Antihelix

Antitragus

Ear lobe

1 I 2

K l

Posterior LateralI

Anterior

Internal View

1. Malleus (hammer)2. Incus (anvil)3. Tympanic ring4. Tympanic membrane

(eardrum)

| :

Tympanicmembrane(eardrum)

Temporal bone

Styloid process

11

L

Internal carotid artery

-Tensor tympani muscle

10

Eustachian tube

Cartilaginous portion ofeustachian tube

Membraneous Labyrinth

1. Malleus2. Incus

3. Stapes in oval vestibular window4. Vestibule5. Ampullae6. Lateral semicircular canal7. Posterior semicircular canal8. Anterior semicircular canal9. Common bony limb10. Cochlear nerve (VIII cranial)11. Cupula

External View

1. Incus (anvil)2. Malleus (hammer)3. Tympanic membrane

(eardrum)

Anterolaterai View

1. Posterior semicircular canal2. Anterior semicircular canal3. Lateral semicircular canal4. Ampulla of anterior canal5. Ampulla of lateral canal6. Stapes7. Vestibule8. Cupula9. Cochlear nerve (VIII cranial)

Photography of Denoyer-Geppert models

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1.2.3.4.5.6.7.8.9.10.

14.15.16.17.18.19.20.21.22.23.24.25.26.

THREE PART EAR

Auricle (or pinna)Cartilage and skinExternal auditory canalWax-producing glandsEarlobeCartilage of external auditory meatusTemporal boneStyloid processTympanic (fibrocartilaginous) ringTympanic membrane (eardrum)

Auditory Ossicles:

11.12.13.

Anterior ligament of malleusPosterior ligament of incusTensor tympani muscleStapedius muscleTympanic cavityEustachian tubeAnterior semicircular canalAmpulla of superior canalPosterior semicircular canalAmpulla of posterior canalLateral semicircular canalAmpulla of lateral canalVestibule

27.

28.29.

30.31.32.33.34.35.36.

Incus (anvil)Malleus (hammer)Stapes (stirrup)

Oval window (located under stapes)(Vestibular window)Round window (cochlear window)Cochlea, first turn

Scala vestibuli (orange)Scala media (white)Scala tympani (blue)

Cochlea, second turnCupulaVestibular nerve (VIII Cranial)Cochlear nerve (VIII Cranial)Facial nerve (VII Cranial)Internal carotid arteryCartilaginous portion of Eustachian tube

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