Cochlear Implants Flashcards
What is a cochlear implant?
a device that sends electrical signals to auditory nerve fibers in order to restore hearing to people with severe or profound hearing loss.
When was the first cochlear implant made?
1972
______ rely on the hair cells functioning to some extent and mechanically stimulate the hair cells
Hearing aids
When did cochlear implants become available to 2 year olds?
1980s
Multielectrode devices began to be used widely in _____
1985
How does a cochlear implant work?
First, the microphone picks up sound; second, the speech processor filters, analyzes, and digitizes the sound into signals; third, the processor sends the signals to the headpiece or external telecoil. The telecoil sends those signals to the interal receiver via FM waves to the internal receiver. The internal receiver sends electrical energy to the electrodes implanted on the cochlea which stimulates the auditory nerve. The auditory nerve sends the information to the brain for it to interpret the signal.
What are the external parts of a cochlear implant?
transmitter coil, microphone, headset, battery, speech processor,
What are the internal parts of a cochlear implant?
receiver and electrode array
The ________ sends electrical signals to the auditory nerve.
electrode array
The _______ receives signals and converts it to electrical signals
receiver
Where is the electrode array placed in the middle ear?
scala tympani
The base of the cochlea hears _______ sounds, whereas the apex of the cochlea hears ______ sounds.
high frequency; low-frequency
