(Netter Basic Science) Frank H. Netter - Atlas of Human Anatomy-Elsevier (2018)

Bony and Membranous Labyrinths
See also Plate 135
2
Right bony labyrinth (otic capsule), anterolateral view:
surrounding cancellous bone removed
Dissected right bony labyrinth (otic capsule):
membranous labyrinth removed
Posterior
Lateral
Anterior
Semicircular canals
Posterior
Lateral
Anterior
Semicircular canals
Common bony limb
Ampullae
Vestibule
Cochlea
Elliptical recess
Cochlear recess
Spherical recess
Vestibule
(note
perforations
for nerve
fibers)
Helicotrema
Hamulus
of spiral
lamina
Oval (vestibular)
window
Cochlear (round) window
Cochlear
cupula
Internal opening of
vestibular aqueduct
(for endolymphatic
duct)
Cochlear (round) window
Scala vestibuli
Osseous spiral
lamina
Scala tympani
Right membranous labyrinth with nerves: medial view
Cochlear duct (basal turn)
Superior part of vestibular nerve
(from utricle and anterior and
lateral ampullae)
Utricle
Anterior semicircular duct
Anterior ampulla
Lateral ampulla
Common
membranous limb
Cochlear nerve
Lateral
semicircular
duct
Vestibulocochlear nerve (CN VIII)
Vestibular nerve
Vestibular ganglion
(of Scarpa)
Inferior part of vestibular nerve (from
saccule and posterior ampulla)
Saccule
Endolymphatic duct
Posterior
semicircular
duct
Posterior ampulla
Ear Plate 108
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