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The flashcards below were created by user
juliemarie
on FreezingBlue Flashcards.
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Basics:
The cochlea is fluid filled and the ear canal is air filled, therefore, the middle ear must function in:
Impedance matching
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Basics:
What begins at the cochlea?
Frequency analysis
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Basics:
Frequency peak displacement for higher frequency tones occurs where?
Frequency peak displacement for lower frequency tones occurs where?
Why is this?
- Base
- Apex
- Increase in stiffness correlates to increase in amplitude (higher frequency)
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Basics:
Places on the basilar membrane correspond to different tones, this is known as
tonotopical organization
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Basics:
The basilar membrane essentially functions as many what?
What is this?
- overlapping band pass filters
- A band pass filter allows certain frequencies to pass, but not others
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On what scale is the stiffness of the basilar membrane?
What does the basilar membrane break a tone into?
Which is a damaged cochlea (active or passive)?
- logarithmic
- amplitude components
- passive: the energy in this cochlea will be lost over time, an active cochlea overcomes frictional forces of the coclear fluid.
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Sensory information from the hearing mechanism is picked up by:
Motor information is carried to the hearing mechanism by:
Is there inhibition in the auditory nerve?
- Inner Hair Cells
- Outer Hair Cells
- No
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These IHC carry action potentials, which occur more frequently in the presence of:
and where specifically:
As ____ is increased, the _______ _____ increases as well until total __________ is met.
- a tone, but they also fire spontaneously
- at the peaks of the sine wave (not the troughs)
- Sound Pressure Level (SPL)
- firing rate (of APs)
- saturation
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There are two ways to code an action potential:
- 1. Based on counting the number of action potentials in a given time (rate)
- 2. Based on temporal coding determined by phase locking
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