PathwayofSoundReception
Plate94
Ear
Limbs of stapes
Facial nerve (VII) (
cut
)
Prominence of lateral semicircular canal
Base of stapes in oval (vestibular) window
Vestibule
Semicircular ducts, ampullae, utricle, and saccule
Incus
Tegmen tympani
Malleus (head)
Epitympanic recess
Auricle
Facial nerve (VII) (
cut
)
Arcuate
eminence
Vestibular nerve
Cochlear nerve
Frontal section
Internal acoustic
meatus
Vestibulocochlear
nerve (VIII)
Tympanic membrane
Parotid gland
Tympanic cavity
Promontory
Round (cochlear) window
Pharyngotympanic (auditory,
eustachian) tube
Internal jugular vein
External
acoustic meatus
Helicotrema
Nasopharynx
Cochlea
Note: Arrows indicate course of sound waves.
Scala vestibuli
Scala tympani
Cochlear duct
containing
spiral organ
(of Corti)
Adult
Pharyngotympanic
(auditory, eustachian)
tube
Child
Pharyngotympanic
(auditory, eustachian)
tube is shorter and
more horizontal
