WorksheetsEcochG
Total questions: 15
Worksheet time: 7mins
What is the primary purpose of electrocochleography (ECochG)?
To measure sound intensity
To acquire electrical responses from the cochlea and the eighth nerve
To assess hearing loss
To evaluate balance
Which of the following is NOT a component of the ECochG waveform?
Cochlear microphonics
Summating Potential
Action Potential
Auditory brainstem response
Who first recorded cochlear microphonics (CM)?
Hallowell Davis
Wever and Bray
Tasaki
Dallas
What type of potential is the Summating Potential (SP)?
Alternating current (AC)
Direct current (DC)
High Frequency
Low Frequency
What does an enlarged SP typically indicate in a clinical context?
Normal hearing function
Meniere’s Disease/Endolymphatic Hydrops
Cochlear damage
Auditory nerve dysfunction
Which stimulus is most often used to generate the Action Potential (AP)?
Continuous tone
Pure Tones
White noise
Click stimuli
What is the role of differential amplifiers in ECochG recordings?
To filter out low-frequency sounds
To convert analog signals to digital
To amplify the difference between voltages of two inputs while removing noise
To amplify all signals equally
Which electrode type penetrates the tympanic membrane to contact the cochlea?
Transtympanic electrode
Surface electrode
Extratympanic electrode
Ball electrode
What is a common health risk associated with needle electrodes used in ECochG?
Noise interference
Spread of disease by an unsterilized needle
Electrical shock
Allergic reactions
In what way does averaging benefit the recording of evoked potentials in ECochG?
It increases the amplitude of responses.
It reduces the duration of recordings.
It eliminates the need for electrodes.
It allows extraction of responses from noise.
What is the primary anatomical structure involved in generating cochlear microphonics?
IHC
OHC
Auditory Nerve Fibers
Basilar Membrane
How does frequency affect ECochG responses?
Responses are more robust at high frequencies.
Responses are more robust at low frequencies.
Frequency has no effect on responses.
Responses are only measurable at mid frequencies.
Which technique involves placing an electrode on or near the round window?
Extratympanic technique
Surface electrode technique
Transtympanic technique
Needle electrode technique
What does common mode rejection in differential amplifiers help to eliminate?
Desired signals
Noise that is similar at both electrodes
High-frequency signals
Low-frequency signals
Which recent advancement has been made in intra-cochlear ECochG recordings during cochlear implantation?
Use of surface electrodes only
Exclusive use of transtympanic methods
Elimination of all invasive techniques
Measurement using CI electrodes as recording electrodes
