Outer Ear
True or False: The cartilagenous meatus is the medial 2/3 of the external auditory meatus.
False
What is the name for the malleus, incus and stapes?
The ossicular chain
True or False: The base of the basilar membrane responds to low frequency sounds.
False
The name for organization by frequency in the cochlea and cortex
Tonotopic arrangement
Is the mouth inferior or superior to the nose?
Inferior
Name the inner or most medial landmark of the external auditory meatus.
Tympanic membrane
What does the stapedius muscle do?
It provides a protective mechanism by limiting movement and stiffening ossicular chain when there's extremely loud sounds
Name the semicircular canals and their orientation (vertical, lateral).
Anterior - vertical
Posterior - vertical
Horizontal - lateral
What is the frequency to which an 8th nerve fiber responds best?
Characteristic frequency
Is the pinna medial or lateral to the incus?
Lateral
Name the landmarks of the auricle or pinna.
Helix, antihelix (bifurcates into crura), scaphoid fossa, and triangular fossa
Which cranial nerve innervates the tensor tympani?
CN 5 - trigeminal nerve
The round window communicates with the middle ear and...
the scala tympani
This is the direct current shift in endocochlear potential which results in inner hair cell depolarization
Summating potential
Is the ossicular chain medial or lateral to the external auditory meatus?
Medial
Which layer of the tympanic membrane has radial and circular fibers?
Intermediate layer
The footplate of the stapes articulates with...
the oval window
The organ of corti is housed in the...
Intensity coding involves these two types of neurons
High threshold and low threshold neurons
Is the oval window superior or inferior to the round window?
Superior
Which frequencies are most enhanced by the outer ear? And why?
1500-8000Hz because these frequencies are most important/used in speech
Name one important function of the middle ear besides the transduction of acoustic energy to mechanical energy
Impedance matching
Which hair cells are shaped in a U pattern?
Inner hair cells
The primary auditory cortex is also known as...
Heschl's gyrus
Is the cochlea anterior or posterior to the semicircular canals?
Anterior