Inner Ear - Anatomical Details

Anatomical Details

Top image is antero-lateral and bottom image is postero-medial.

  1. Lateral semicircular canal; 1’, its ampulla
  2. Posterior canal; 2’, its ampulla
  3. Superior canal; 3’, its ampulla
  4. Conjoined limb of superior and posterior canals (sinus utriculi superior)
  5. Utricle; 5’. Recessus utriculi; 5”. Sinus utriculi posterior
  6. Ductus endolymphaticus
  7. Canalis utriculosaccularis
  8. Nerve to ampulla of superior canal
  9. Nerve to ampulla of lateral canal
  10. Nerve to recessus utriculi (in top image, the three branches appear conjoined); 10’. Ending of nerve in recessus utriculi
  11. Facial nerve
  12. Lagena cochleæ
  13. Nerve of cochlea within spiral lamina
  14. Basilar membrane
  15. Nerve fibers to macula of saccule
  16. Nerve to ampulla of posterior canal
  17. Saccule
  18. Secondary membrane of tympanum
  19. Canalis reuniens
  20. Vestibular end of ductus cochlearis
  21. Section of the facial and acoustic nerves within internal acoustic meatus (the separation between them is not apparent in the section)
  22. (No entry)
  23. Vestibulocochlear nerve (auditory or acoustic, cranial nerve VIII)

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