Otology Self Study multiple choice questions

The protuberance just behind the ear which is a portion of the temporal bone is called

the mastoid

Which procedure converts the middle ear and mastoid into a single cavity?

radical mastoidectomy

Receptors for the sense of hearing are located in the

cochlea

The footplate of this bone fits in the oval window

the stapes

A reconstruction of the outer and middle parts of the ear by means of a new drum or skin flap, or the creation of a new window into the internal ear is called a

myringoplasty

Severe stimulus to the vestibule in the inner ear disturbs equilibrium and can cause what two symptoms?

vertigo and nystagmus (uncontrollable eye movement)

The inner ear and mastoid are located in which cranial bone?

the temporal bone

A cochlear duct contains

endolymph

Cochlear duct procedures are performed under what kind of visualization?

magnification

Which bone of the ossicular chain consists of a head, neck, anterior crus, posterior crus, and a footplate?

the stapes

What part of the inner ear provides the path by which throat infections may invade the middle ear?

the eustachian tube

The ossicular bone that resembles a stirrup is the

stapes

What structure separates the external ear from the middle ear?

the tympanic membrane

Shrapnell’s membrane, AKA the pars flaccida, is the upper portion of which structure?

the tympanic membrane

Another name for earwax

cerumen

The middle ear contains which bones?

malleus, incus, and stapes

Sound waves are transmitted to the brain from the cochlea through which nerve?

The acoustic nerve, AKA vestibulocochlear nerve, AKA Cranial Nerve VIII

The ossicular bone that resembles a hammer is the

malleus

Meniere’s syndrome is a disease that involves the

inner ear

The tympanic membrane separates the

external and middle ear

Which bone fuses with the base of the skull and houses the inner ear structures, including the sensory organs of hearing and equilibrium?

the mastoid portion of the temporal bone

Receptors for the sense of body position and equilibrium are located in the

semicircular canals

The vibrating bones of the middle ear are called the

malleus, incus, and stapes

What is the sequence in which sound waves travel through the ear to the auditory nerve?

external ear canal, tympanic membrane, malleus, incus, stapes, oval window, cochlea, auditory nerve

The cochlea and vestibular labyrinth are located in the

inner ear

The membranous semicircular canals are separated from the bony semicircular canals by

perilymph

An individual born with the absence of the middle ear would be unable to

hear any sound

Removal of the air cells of the mastoid process without disturbing the contents of the middle ear

simple mastoidectomy

Otosclerosis is a diseases which can be simply described as

a locking of the bony chain due to fixation of the stapes

Sound waves project through what? (three answers)

bone conduction, air, fluid

The vestibular labyrinth is a structure found in the inner which has to do with

equilibrium

The central section of the bony labyrinth is the

vestibule

The auditory nerve is the nerve of

hearing and equilibrium

Incision of the tympanic membrane under direct vision is called a

myringotomy

The most common cause of conductive hearing loss in people between the ages of 15 and 50 is

otosclerosis

Surgery performed to treat Meiere’s disease that destroys the inner ear to prevent intracranial spread of the infection from the labyrinth is called a

labyrinthectomy

A mastoidectomy is performed through which incision?

postauricular

Other names for the auditory nerve are (three)

acoustic nerve, vestibulochoclear nerve, cranial nerve VIII

What is the function of the eustachian tube?

to equalize the air pressure between the middle ear and the pharynx

The passageway or tube which connects the middle ear to the nasopharynx is called the

eustachian tube

Which position is usually used when performing otological procedures?

supine with affected side turned upwards

The organ of Corti, the cochlea, and endolymph are found where?

in the internal ear

Creation of an opening into the vestibule of the labyrinth and reestablishment of a functioning linkage between the incus and inner ear is called a

stapedotomy

Another name for a type one tympanoplasty is

a myringoplasty

The ossicular bone that resembles an anvil is the

malleus

The external ear is sometimes known as the

pinna

What is the name of the organ of hearing that rests along the basilar membrane and extends along the length of the cochlear duct?

the organ of Corti

Another name for the middle ear is the

tympanic cavity

When the incision is made within the external ear canal and extends from the drum outward, it’s called an

endaural incision

The hearing sense organ is called the organ of

Corti