1
Hearing Lab 1
Models and Review (Noncadaver Lab)
To the Instructor:
Because the structures in the hearing mechanism are so small, models are really the best way to
work on them. I have also included a list of figures that might be useful, all of which are
available in the Image Library section of the Instructor Resources CD-ROM.
Figure
5-1
Outer, middle, and inner ear
5-2
Pinna landmarks
5-3
Tympanic membrane landmarks
5-4
Articulated ossicles
5-5
Ossicles
5-6
Right middle ear cavity landmarks
5-7
Membranous labyrinth
5-8
Landmarks of the scala media
5-9
Landmarks of the organ of Corti
2
Hearing Lab 1
Models and Review (Noncadaver Lab)
You will want to familiarize yourself with the terminology, spelling, structures, and landmarks
indicated below.
Outer ear:
pinna
helix
anthelix
crura of helix
concha cava
tragus
antitragus
lobule
external auditory meatus (auditory canal)
cartilaginous and bony portions
canal course
Middle ear:
tympanic membrane
malleus
incus
stapes
orifice for Eustachian tube (auditory tube)
tensor tympani and canal for tensor tympani
promontory
chorda tympani (VII facial)
prominence for lateral semicircular canal
Inner ear:
cochlea
scala vestibuli
scala tympani
scala media
Reissner’s membrane
organ of Corti
tunnel of Corti
outer and inner hair cells
stria vascularis
osseous spiral lamina
spiral limbus
spiral ganglion
tectorial membrane
3
Copyright ©2014 Delmar, Cengage Learning. All Rights Reserved.
endolymph
perilymph
VIII auditory nerve
vestibular mechanism
VIII vestibular nerve
lateral semicircular canal
posterior semicircular canal
superior semicircular canal
utricle
saccule
relationship to cochlea via vestibule