Page 272 - Clinical Manual of Small Animal Endosurgery

260 Clinical Manual of Small Animal Endosurgery

Semicircular ducts
Petrous temporal bone
Utricle
Saccule Perilymphatic space of vestibule
Endolymphatic duct Base of stapes in vestibular
Endolymphatic sac Stapes window
Incus
Scala vestibuli
Cochlear duct Malleus
Scala tympani External
Dura mater acoustic meatus
Cochlear aqueduct
Cochlear window

Tympanic membrane

Auditory tube
Tympanic bulla Tympanic cavity

(a)

Cranial
Tympanic membrane and manubrium Eustachian tube

External ear canal A

Lateral
Medial
B

Round window
(b) Promontory

Fig. 9.5 Schematic drawings showing the anatomy of the canine (a)
and feline (b) ear. In (b), A and B refer to the two compartments of the
feline bulla, a smaller dorsal compartment (A) and a larger ventral
compartment (B).