CNIM Review questions with answers
Which of the following is a clinical indication of a lower motor neuron lesion? - ANSWER:
✔✔Fasciculation
A stroke associated with a carotid endarterectomy will most likely occur: - ANSWER: ✔✔After cross-
clamping
Troubleshooting in the operating room is facilitated by - ANSWER: ✔✔viewing the raw signal input.
Which TcMEP wave is MOST affected by a bolus of 30 mg rocuronium? - ANSWER: ✔✔I-Wave
During a posterior cervical fusion for spinal stenosis, a global shift in latency cortical and subcortical
ulnar and tibial nerve SSEPs are noted an hour following exposure. This change could be indicative of -
ANSWER: ✔✔Head/neck positioning
Stimulus artifact during SSEPs can be decreased by: - ANSWER: ✔✔Lowering the impedances of ground
and stimulating electrodes
An analysis time of 5 msec is appropriate for monitoring: - ANSWER: ✔✔ECochG
What is the required vertical resolution of an evoked potential system? - ANSWER: ✔✔16 bits
If an amplifier has a common mode rejection ratio of 100:1, what is the corresponding dB? - ANSWER:
✔✔40
The surgical site for a posterior fossa tumor surgery requires adjustment of the standard SSEP recording
electrodes. Which adjustments should be made? - ANSWER: ✔✔Move C5S lateral
, A positive event occurring in the lead connected to the negative terminal, will result in a deflection -
ANSWER: ✔✔Downward
What would be the intraoperative use of DSEP? - ANSWER: ✔✔Prevent nerve root injuries during the
spinal cord manipulation
The anterior spinothalamic tract carries the sensory modalities of: - ANSWER: ✔✔Crude touch
Which of the following opposes any change in current? - ANSWER: ✔✔Inductance
D-Wave - ANSWER: ✔✔Spinal epidural recording
Monitoring the posterior tibial nerve SSEPs is most appropriate in cerebrovascular procedures involving
which of the following arteries? - ANSWER: ✔✔Anterior cerebral
What abnormality can a defect in lower motor neurons cause? - ANSWER: ✔✔Flaccid Paralysis
Which modalities should you monitor for a C7 fracture? - ANSWER: ✔✔Ulnar nerve and PTN
I-Waves and muscle artifact appear at a latency: - ANSWER: ✔✔Later than the D-Wave
Which of the following anesthetic agents will NOT obliterate the transcranial electric motor evoked
potential? - ANSWER: ✔✔Fentanyl
How do benzodiazepines affect cortical SEP waves? - ANSWER: ✔✔decrease amplitude
MRI conditional electrodes are made from which of the following? - ANSWER: ✔✔Nickel titanium
Which of the following would result in the best resolution in the analog-to-digital conversion process? -
ANSWER: ✔✔The maximal peak-to-peak signal amplitude should match the converter range
Which of the following is a clinical indication of a lower motor neuron lesion? - ANSWER:
✔✔Fasciculation
A stroke associated with a carotid endarterectomy will most likely occur: - ANSWER: ✔✔After cross-
clamping
Troubleshooting in the operating room is facilitated by - ANSWER: ✔✔viewing the raw signal input.
Which TcMEP wave is MOST affected by a bolus of 30 mg rocuronium? - ANSWER: ✔✔I-Wave
During a posterior cervical fusion for spinal stenosis, a global shift in latency cortical and subcortical
ulnar and tibial nerve SSEPs are noted an hour following exposure. This change could be indicative of -
ANSWER: ✔✔Head/neck positioning
Stimulus artifact during SSEPs can be decreased by: - ANSWER: ✔✔Lowering the impedances of ground
and stimulating electrodes
An analysis time of 5 msec is appropriate for monitoring: - ANSWER: ✔✔ECochG
What is the required vertical resolution of an evoked potential system? - ANSWER: ✔✔16 bits
If an amplifier has a common mode rejection ratio of 100:1, what is the corresponding dB? - ANSWER:
✔✔40
The surgical site for a posterior fossa tumor surgery requires adjustment of the standard SSEP recording
electrodes. Which adjustments should be made? - ANSWER: ✔✔Move C5S lateral
, A positive event occurring in the lead connected to the negative terminal, will result in a deflection -
ANSWER: ✔✔Downward
What would be the intraoperative use of DSEP? - ANSWER: ✔✔Prevent nerve root injuries during the
spinal cord manipulation
The anterior spinothalamic tract carries the sensory modalities of: - ANSWER: ✔✔Crude touch
Which of the following opposes any change in current? - ANSWER: ✔✔Inductance
D-Wave - ANSWER: ✔✔Spinal epidural recording
Monitoring the posterior tibial nerve SSEPs is most appropriate in cerebrovascular procedures involving
which of the following arteries? - ANSWER: ✔✔Anterior cerebral
What abnormality can a defect in lower motor neurons cause? - ANSWER: ✔✔Flaccid Paralysis
Which modalities should you monitor for a C7 fracture? - ANSWER: ✔✔Ulnar nerve and PTN
I-Waves and muscle artifact appear at a latency: - ANSWER: ✔✔Later than the D-Wave
Which of the following anesthetic agents will NOT obliterate the transcranial electric motor evoked
potential? - ANSWER: ✔✔Fentanyl
How do benzodiazepines affect cortical SEP waves? - ANSWER: ✔✔decrease amplitude
MRI conditional electrodes are made from which of the following? - ANSWER: ✔✔Nickel titanium
Which of the following would result in the best resolution in the analog-to-digital conversion process? -
ANSWER: ✔✔The maximal peak-to-peak signal amplitude should match the converter range
