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Clinical Applications of Electrocochleography in Audiology Today

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1.  ECochG clinical applications include all of the following EXCEPT: Enhancement of ABR wave I Diagnosis of Meniere’s disease Diagnosis of auditory neuropathy spectrum disorder Diagnosis of auditory processing disorders (APD)

2.  An appropriate analysis time for pure ECochG measurement is: 1 ms 5 ms 15 ms 100 ms

3.  Which of the following is NOT a component of ECochG: Cochlear microphonic (CM) Summating potential (SP) Action potential (AP) Wave V

4.  ECochG was discovered in the year: 1900 1930 1955 1971

5.  Which electrode option is optimal for non-invasive ECochG recording (i.e., produces the largest response): Disposable electrode on the mastoid TIPtrode Tympanic membrane electrode Transtympanic needle promontory electrode

6.  Which of the following types of stimulation are used in eliciting an ECochG : Rarefaction polarity clicks Condensation polarity clicks Alternating polarity clicks All of the above are used in eliciting an ECochG

7.  In diagnosis of auditory neuropathy spectrum disorder, ECochG helps to differentiate Wave IV from wave V Conductive versus sensorineural hearing loss Pre- versus post-synaptic auditory dysfunction Brainstem versus cortical auditory dysfunction

8.  The summating potential (SP) component of ECochG is produced largely by Outer hair cells Inner hair cells Auditory nerve fibers All of the above

9.  The AP of the ECochG is the same wave as: ABR wave I ABR wave III ABR wave V None of the above

10.  Which of the following best describes the relation between ECochG amplitude and electrode location: No relation Amplitude decreases as electrode distance from the cochlea decreases Amplitude is greatest with a vertex electrode site Amplitude increases as electrode distance from the cochlea decreases