Test 2 Flashcards
The peripheral auditory system…
collects and conducts sound energy
performs frequency intensity analysis (Fourier analysis)
transmits that electrical energy to the central auditory pathway
The central auditory system is responsible for…
auditory memory
receiving electrical signals
localization
True or False:
The pinna collects and transmits sounds to the middle ear through the EAM
True
The Concha Effect…
improves hearing for high frequency sounds
True or False:
The anterior 1/3 of the EAM is the bony portion of the external auditory canal
False- the anterior 1/3 of the EAM is the softer, cartilaginous portion of the external auditory canal
True or False:
The posterior 2/3 of the EAM is the bony portion of the external auditory canal
True
True or False:
Wax in the ear acts as a lubricant and provides protective function
True
True or False:
The stapedius muscle provides protection from loud sounds (85 dB and greater) and for low frequencies (1000 Hz and below)
True
True or false
The oval and round windows are located on the lateral wall of the middle ear
False- the oval and round windows are located on the medial wall of the middle ear
The tympanic membrane (ear drum) is on which wall of the middle ear?
The lateral wall
We can see this looking into the ear
True or False:
The tympanic membrane and the oval window provides you a dB (SPL) gain of 25dB (SPL)
True
The posterior wall of the middle ear…
contains the mastoid air cells
Mastoiditis…
is when an infection from the middle ear goes through the posterior wall (through the aditus) and results in an infection of the mastoid bone
Eustachian tube connects…
the middle ear to the back of the throat through the anterior wall of the middle ear
Which middle ear land marks can you see with an otoscope?
manubrium, pars tensa, and cone of light
The tensor tympani is attached to the handle of the malleus and it is innervated by which nerve?
a branch of the trigeminal nerve (carotid tympani nerve)
Which cranial nerve supplies the stapedius
Facial nerve (CN VII)
3 primary functions of the middle ear…
pressure gain
equalize pressure
protection
Middle ear provides us with dB gain of…
30 dB
The mechanical lever action of the middle ear ossicles provide us with dB gain of…
5 dB
The bony protrusion between the oval and round window is referred to as…
promontory
True or False:
The tendon of the stapedius is contained in the pyramid
True
The Organ of Corti sits on…
the basilar membrane
True or False:
The scala media, scala tympani, and scala vestibuli are all part of the bony labyrinth
False- only the scala vestibuli and scala tympani are part of the bony labyrinth
