Quiz 2 Flashcards
(32 cards)
Injury to which of the following structures is most likely to sever the dendrites of spiral ganglion neurons?
Osseous lamina
Facial nerve
Lateral wall
Basilar membrane
Osseous lamina
Modern cochlear implant systems typically incorporate dual microphones to improve listening in noise.
true
Persistent inflammation following electrode insertion trauma during cochlear implantation can result in which of the following complications?
Development of fibrosis and calcification
Lateral wall damage
Reduced fibrosis and calcification due to increased blood flow
Disruption of the basilar membrane, allowing mixing of perilymph and endolymph
Development of fibrosis and calcification
Compression in a CI system is used to:
Decrease the number of electrodes
Reduce the frequency of the signal
Improve the microphone performance
Match the acoustic signal to electrical dynamic range
Match the acoustic signal to electrical dynamic range
Which mode is most effective for detecting shorted electrodes during impedance testing in cochlear implants?
Monopolar
Common ground
MP2
Tripolar
common ground
To deliver current in a cochlear implant system, the active electrode must always be paired with a return (or reference) electrode.
true
Which of the following is used in cochlear implant technology to prevent charge accumulation and reduce the risk of tissue damage?
Monophasic current pulses
Constant voltage stimulation
Constant current stimulation
Charge-balanced biphasic current pulses
Charge-balanced biphasic current pulses
The design and geometry of electrode contacts can influence the distribution of the electrical current.
true
Which of the following is least likely to influence electrode impedance in a cochlear implant system?
Shape and design of the electrode contact
Electrode lead connected to the contact
Properties of surrounding tissue
Applied voltage
Applied voltage
Which component of the cochlear implant system is responsible for decoding the radio frequency (RF) signal?
Speech processor
Electrode array
Electrode lead
Receiver-stimulator package
Receiver-stimulator package
Which of the following is least likely to result in abnormally high impedance?
Kinked electrode array
Broken electrode contact
Air bubble or ossification
Prolonged electrode deactivation
Kinked electrode array
Which of the following is least likely to be considered a sign of soft implant failure?
Annoyance with high-frequency stimulation
Head-hitting behavior in young children
Pain radiating down the neck
Perception of static or noise
Annoyance with high-frequency stimulation
What type of acoustic feature does the F0/F1/F2 strategy primarily focus on?
Envelope cues
Temporal rhythms
Spectral formants
None of the above
Spectral formants
Which process in the speech processor separates the signal into multiple bands?
Compression
Filtering
Modulation
Amplification
filtering
What maintains alignment between the internal and external components of a cochlear implant system?
RF link
Bluetooth
Magnet
Telecoil
magnet
How does the ACE strategy differ from SPEAK?
Uses analog pulses
Operates at higher stimulation rates
Uses lower stimulation rate
Eliminates envelope detection
Operates at higher stimulation rates
Extremely low electrode impedance values (e.g., <1 kΩ) most likely indicate:
Shorted electrodes
Open electrodes
Partial short circuit
Voltage compliance
shorted electrodes
In the n-of-m coding strategy, what determines which electrodes are activated?
Random selection
Low-frequency dominance
Electrodes with the highest signal amplitudes
ser preference settings
Electrodes with the highest signal amplitudes
Which coupling configuration involves one intracochlear electrode delivering stimulation while all other intracochlear electrodes serve as the return?
Common ground
Bipolar
Monopolar
Tripolar
Common ground
Which component of the cochlear implant system directly stimulates the auditory nerve fibers?
Transmitting coil
Internal receiver stimulator
Electrode array
Directional microphone
electrode array
Which of the following correctly lists the internal components of a cochlear implant system?
Microphone, power source, transmitter, and speech processor
Receiver/stimulator, electrode leads, magnet, and electrode array
Receiver, cord, and amplifier
Amplifier, digital speech processor, coil, and electrode array
Receiver/stimulator, electrode leads, magnet, and electrode array
Voltage is the rate at which electric charge (ions or electrons) moves through a medium, and is measured in amperes.
false
In N-of-M strategies, “N” refers to:
Electrodes selected for stimulation
Total filters
Frequency bands
Pulse cycle
Electrodes selected for stimulation
Which speech coding strategy emphasizes fast pulse stimulation and temporal
detail?
ACE
SPEAK
MPEAK
CIS (continuous interleaved sampling)
CIS (continuous interleaved sampling)
