CNIM TEST 2024
New Full Questions and Answers ( Included ) 100% Correct
- In BAEP's, cochlear nucleus lesion causes?
Answer: Increased III-V, increased I-V
- Which modality is most useful in monitoring the integrity of the corticospinal tracts during
resection of an intramedullary spinal cord tumor?
Answer: - D-Waves
- The stimulus used in a brainstem auditory evoked potential study is a click with a peak
acoustic power in the range of
Answer: 2000 to 4000Hz
- Which of the following tibial nerve responses is not a near field response?-
Answer: N31
- How many amperes of current will flow in a circuit containing a 2V battery and 10 ohms of
resistance?
Answer: 0.2 amps
6. In BAEP's blood, betadine or irrigation fluid in tubing causes:
Answer: Increase in absolute latency, normal inter-peak latencies
- In averaging, the period of analysis is called or .
Answer: Epoch, sweep length
- While monitoring BAEP, there was a prolongation of wave I through V by more than 2
msec. Which of the following choices is NOT a possible cause?-
Answer: Increase of isoflurane anesthesia
- Involuntary movement
Answer: Ataxia
10. Smaller surface of stimulating electrodes:
Answer: Higher Current Density
- During posterior fossa surgery, when BAEPs are used for monitoring brain- stem function, it
is most important to:
Answer: Stimulate and record from the contralateral side
- P100 of a VEP will have the highest amplitude in which derivation? 1 / 2
Answer: MO-Fz
- Cranial nerve VII must be monitored concurrently with BAERs.
Answer: True
14. Nerves of the body, such as median, ulnar, and femoral are formed from the:
Answer: Dorsal and ventral rami
15. Upper motor neuron extends from:
Answer: Precentral gyrus to ventral horn
- Increasing the stimulus rate of BAEPs
Answer: Decreases amplitude and increases latency
- Which of the following is the normal interocular latency difference of P100?
Answer: Less than 15 msec
- An amplifier sensitivity setting that produces a vertical deflection of 1cm with an input of
10mV is:
Answer: 1mV/mm
- When identifying wave IV and V of a BAEP, which of the following would be most
helpful?
Answer: Cz-Contra ear montage
- The maximum leakage current should be
Answer: 100 uA
- Wave V is usually the most prominent peak after
Answer: 5.5 msec
- Which of the following montages will best demonstrate waves I through V of the BAEP?
Answer: Cz-ipsilateral ear
- P13 Generator
Answer: Spinomedullary junction
- An electrode recording from Erb's point is placed
Answer: 2-3 cm above the clavicle
25. In BAEP's, perforated or hardened tympanic membrane causes:
Answer: Increase in absolute latency, normal inter-peak latencies
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