17 Auditory System Flashcards
Where is the superior olive nucleus located and how fast is the response?
brainstem; 1000x per second
There are 3 neurons in the superior olive nucleus. Which one respond to only the left ear?
neuron 1
What is type EI neuron?
It is mononaural, and it is activated by one ear but inhibited by the other ear.
What technique can you use to test the hearing of an infant that is 6 months of age?
The use of electrodes to follow the e-volt potential.
What is the central auditory pathway?
a. dorsal stria -> trapezoid body -> lateral lemniscus -> intermediate stria -> S. olivary N. -> I. Colliculus ->MGN
b. intermediate stria -> trapezoid body -> dorsal stria -> S. Olivary N. -> I. colliculus -> lateral lemniscus -> MGN
c. dorsal stria -> intermediate stria -> trapezoid body -> S. olivary N. -> lateral lemniscus -> I. colliculus -> MGN
c. dorsal stria -> intermediate stria -> trapezoid body -> S. olivary N. -> lateral lemniscus -> I. colliculus -> MGN
Adult brainstem responses are stronger with early musical training. T/F
True
At how much milliseconds of wave form is where you hear the differences of similar sounding words?
At first 40ms
There are tonotopic mappings in the auditory cortex. T/F
True
True/False: Hair cells move with sound waves
True
Hair cell transduction is sensitive to ______ changes in sound pressure.
Small
Mechanically gated K+ channels respond to _____
Cilia bends
Where does most of the input to spiral ganglion cells come from?
Inner hair cells (95%)
At what frequency is the highest peak of response to high and low intensity sound?
1500Hz
Sound travels at ____ miles per hour.
760
The ear can pick up oscillations from ___ to _____ Hz.
20 to 20,000 Hz
Anything that can move air molecules create sound. T or F?
True
What are the three bones that make up the ossicles?
Malleus, Incus, Stapes
Which portion of the inner ear is full of fluid and converts air pressure into vibrations?
Cochlea
The Middle Ear does not amplify sound. T or F?
False. Middle Ear DOES amplify sound
How do the Middle Ear muscles reduce sound?
By contraction
At higher alititudes, babies tend to cry because their ____ is not fully developed.
Eustachian tube
Vibrations at different frequencies are absorbed at different parts of the basilar membrane. T/F?
True
Where are high frequency vibrations absorbed in the basilar membrane?
Absorbed first, near the Stapes
Where does the movement of the basilar membrane get translated into a synapse?
Organ of Corti
There are about 3500 inner hair cells in a single row and 15000-20000 outer hair cells that are in three rows. T/F
True
Hair cells that break can be replaced. T/F
False. They cannot be replaced
