Structures of the Ear

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Structures of the Ear
2011-04-26 19:53:47
ear anatomy

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  1. auditory tube
    equalizes air pressure between the external ear and the middle ear cavity
  2. auricle
    collects sound waves and directs them toward the external acoustic meatus
  3. basilar membrane
    supports the organ of Corti

    distorts in response to vibrations of the endolymph
  4. cochlea
  5. cochlear duct
    processes sound waves
  6. external acoustic meatus
    sends sound waves to the tympanic membrane
  7. malleus, incus, and stapes
    transmit vibrations from the tympanic membrane to the oval window

    amplifies vibrations
  8. organ of Corti
    supports the hair cells that detect sound

    site of transduction (converting mechanical energy to APs)
  9. outer hair cell
    regulates the tension of the basilar membrane
  10. oval window
    transmits vibrations to the inner ear
  11. round window
    acts as a mechanical release for waves from within the cochlea

    relieves pressure in the perilymph
  12. scala vestibuli
    transmit vibrations to the perilymph of the scala tympani
  13. scala tympani
    carries vibrations to the round window
  14. semicircular canal and ducts
    canal- detects kinetic or dynamic equilibrium (balance)
  15. tectorial membrane
    remains stationary as hair cells on the basilar membrane move
  16. temporal bone
    houses middle ear and the membranous labyrinth
  17. tympanic cavity
    allows tympanic membrane to vibrate
  18. tympanic membrane
    vibrates in response to sound waves
  19. vestibule (utricle and saccule)
    detects static equilibrium
  20. vestibular membrane
    transmits vibrations of the perilymph

    seperates the cochlear duct and the scala vestibuli
  21. vestibulocochlear nerve
    carries info for balance to brain

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