Exam Preview for 23350: Best Practices in Electrophysiology October

Best Practices in Electrophysiology

Please note: exam questions are subject to change.

1. What patient data must be entered in order to utilize the ABR normative data? Birthdate Gender Birthdate & Gender Name only
2. When using common mode rejection the voltage difference is measured for the Active electrode Reference electrode Active and reference electrode Ground electrode
3. In ABR, what response parameter is most obviously different between infant ABRs and adult ABRs? Wave I is larger in infant responses Wave I is smaller in infant responses Wave V is larger compared to wave I in infant responses Wave II is the predominant wave in infant responses
4. What does a latency-intensity function look like for a conductive hearing loss? Steeply sloping Parallel to normal function Normal at high intensities; rising at the low intensities None of the Above
5. Why is it more difficult to obtain a quality recording for a 500 Hz toneburst? Neuronal firing is less synchronous at the lower region of the cochlea 500 Hz toneburst has more energy 500 Hz toneburst does not have a good stimulus spectrum None of the above
6. If a cochlear microphonic is detected, it suggests The brainstem is functioning normally The outer hair cells are intact and there is some neural response That hearing is within normal limits That detection alone suggests the patient has auditory neuropathy without the need to perform other tests
7. What 2 measurements below are used in standard ABR to determine if a tumor is present? Wave V amplitude Wave I-V interwave latency Interaural Wave V latency difference Wave III latency B and C
8. What is the purpose of ECochG? to obtain hearing thresholds in a difficult to test population (i.e. infants) to determine if the patient may have an issue in the inner ear, i.e. endolymphatic hydrops or vestibular hydrops to determine the cause an auditory processing issue all of the above
9. In Electrocochleography, why would you obtain a larger response using TMtrode versus tiptrode? Ability to get better impedance TMtrode is closer to the neural generator Patient is more relaxed with TMtrode and therefore the noise floor is lower None of the above
10. In Electrocochleography, what measurement do you look at to determine whether there is an abnormality in the response? The AP latency The cochlear microphonic frequency The SP/AP ratio None of the above
11. In a normal ear for MLR, what happens to the latency of the response as you decrease intensity? Wave V latency increases Wave V latency decreases Nothing, it stays close to the same None of the above
12. For middle, late and cortical responses, what should the patient state be to obtain the best response? Asleep Awake Sedated None of the above
13. For P300 how many types of stimuli are presented? One toneburst either 1000 or 2000 Hz One click Two - a 1000 Hz toneburst and a 2000 Hz toneburst None of the above
14. Which of the following may cause an abnormal result on P300 testing? Dementia Certain neurological diseases certain psychiatric diseases that cause a disorder of cognitive functioning All of the above
15. The cortical response is not fully mature until what age? 5 years old 30 years old Late teens 75 years old