CNIM EXAM | FROM QUESTION TO PERFECTION|
STUDY WITH CONFIDENCE!
Facial nerve EMG responses are best recorded from - Answer: orbicularis oris and
orbicularis oculi muscles
What intravenous drug is used to maintain hypotension? - Answer: Nutroprusside
At the stage of surgical anesthesia, propofol affects the BAEP by - Answer: increasing the
latencies of waves I, III, and V without changing their amplitudes
If you have a signal to noise ratio of 1:2, averaging 64 responses will: - Answer: improve the
ratio to 4:1
The central conduction time for MN SSEP is: - Answer: P14 - N20
Spinal cord ischemia during aortic surgery is best detected by changes in the - Answer:
posterior tibial nerve somatosensory evoked potential
At the end of an acoustic neuroma surgery, you would test the facial nerve by stimulating: -
Answer: Proximal to the site of the tumor
In the operating room, the stimulus intensity for activating a sensory nerve: - Answer: does
not have an established boundary
The effects of pharmacological or surgical manipulations can be mimicked by the
inappropriate manipulation of: - Answer: filter settings
APPHIA – Crafted with Care and Precision for Academic Excellence.
1
,Eliciting a motor twitch with PTN stimulation, you expect to see: - Answer: Plantar flexion of
the toes
What would be the effect of fluid in the external auditory canal? - Answer: Increase of
absolute latencies
Early changes to CMAPs, during the exposure of CN VII, are most likely due to - Answer:
heating from the electrical cautery device
During microvascular decompression surgery to relieve a hemifacial spasm - Answer: a
stimulation of CN VII elicits a response from the mentalis muscle
Of the following, the peak equivalent SPL of a click should be calibrated at: - Answer: 1000
Hz
An unstable blood pressure during SSEP monitoring in the OR affects cortical EPs resulting
in - Answer: fluctuating amplitudes
Multiple sclerosis, spinal cord injury, and brain trauma can lead to debilitating spasticity
that has been relieved in some patients following: - Answer: selective dorsal rhizotomy
If a 10 microvolt signal inside 50 microvolts of noise is averaged for 100 traces, the final
signal to noise ratio will be: - Answer: 2:1
A patient in a state of surgical anesthesia using nitrous oxide is likely to have a drop in SSEP
amplitudes of - Answer: 0.75
What is the minimum bandpass filter for an evoked potential system? - Answer: 0.1-5000
Hz
APPHIA – Crafted with Care and Precision for Academic Excellence.
2
, A patient is admitted to the operating room diagnosed with a burst fracture of the first
lumbar vertebra. The most appropriate nerve(s) to monitor would be the: - Answer:
posterior tibial and ulnar nerves
If a sound intensity is decreased from 80 dB to 60 dB then the sound pressure has been
decreased by a factor of: - Answer: 10
The term "broadband click" refers to a - Answer: peak acoustic power of 2 - 4 kHz
What is a rhizotomy? - Answer: A procedure to selectively destroy problematic nerve roots
If you receive a shock from the system console, the first thing you should do is: - Answer:
Disconnect the patient
What is the best montage to use to evaluate dorsal column activity? - Answer: Cs5-EPc
The earliest obligate component of the median nerve SSEP that is measured far-field is
generated in the: - Answer: Medial lemniscus
Preservation of facial nerve CMAPs - Answer: does not always indicate a good surgical
outcome
The purpose of preoperative evoked potential testing is to: - Answer: Compare to post-
induction responses
The purpose of isolated amplifier inputs is to: - Answer: prevent a flow of stray currents
through connecting lines to the patient
APPHIA – Crafted with Care and Precision for Academic Excellence.
3
STUDY WITH CONFIDENCE!
Facial nerve EMG responses are best recorded from - Answer: orbicularis oris and
orbicularis oculi muscles
What intravenous drug is used to maintain hypotension? - Answer: Nutroprusside
At the stage of surgical anesthesia, propofol affects the BAEP by - Answer: increasing the
latencies of waves I, III, and V without changing their amplitudes
If you have a signal to noise ratio of 1:2, averaging 64 responses will: - Answer: improve the
ratio to 4:1
The central conduction time for MN SSEP is: - Answer: P14 - N20
Spinal cord ischemia during aortic surgery is best detected by changes in the - Answer:
posterior tibial nerve somatosensory evoked potential
At the end of an acoustic neuroma surgery, you would test the facial nerve by stimulating: -
Answer: Proximal to the site of the tumor
In the operating room, the stimulus intensity for activating a sensory nerve: - Answer: does
not have an established boundary
The effects of pharmacological or surgical manipulations can be mimicked by the
inappropriate manipulation of: - Answer: filter settings
APPHIA – Crafted with Care and Precision for Academic Excellence.
1
,Eliciting a motor twitch with PTN stimulation, you expect to see: - Answer: Plantar flexion of
the toes
What would be the effect of fluid in the external auditory canal? - Answer: Increase of
absolute latencies
Early changes to CMAPs, during the exposure of CN VII, are most likely due to - Answer:
heating from the electrical cautery device
During microvascular decompression surgery to relieve a hemifacial spasm - Answer: a
stimulation of CN VII elicits a response from the mentalis muscle
Of the following, the peak equivalent SPL of a click should be calibrated at: - Answer: 1000
Hz
An unstable blood pressure during SSEP monitoring in the OR affects cortical EPs resulting
in - Answer: fluctuating amplitudes
Multiple sclerosis, spinal cord injury, and brain trauma can lead to debilitating spasticity
that has been relieved in some patients following: - Answer: selective dorsal rhizotomy
If a 10 microvolt signal inside 50 microvolts of noise is averaged for 100 traces, the final
signal to noise ratio will be: - Answer: 2:1
A patient in a state of surgical anesthesia using nitrous oxide is likely to have a drop in SSEP
amplitudes of - Answer: 0.75
What is the minimum bandpass filter for an evoked potential system? - Answer: 0.1-5000
Hz
APPHIA – Crafted with Care and Precision for Academic Excellence.
2
, A patient is admitted to the operating room diagnosed with a burst fracture of the first
lumbar vertebra. The most appropriate nerve(s) to monitor would be the: - Answer:
posterior tibial and ulnar nerves
If a sound intensity is decreased from 80 dB to 60 dB then the sound pressure has been
decreased by a factor of: - Answer: 10
The term "broadband click" refers to a - Answer: peak acoustic power of 2 - 4 kHz
What is a rhizotomy? - Answer: A procedure to selectively destroy problematic nerve roots
If you receive a shock from the system console, the first thing you should do is: - Answer:
Disconnect the patient
What is the best montage to use to evaluate dorsal column activity? - Answer: Cs5-EPc
The earliest obligate component of the median nerve SSEP that is measured far-field is
generated in the: - Answer: Medial lemniscus
Preservation of facial nerve CMAPs - Answer: does not always indicate a good surgical
outcome
The purpose of preoperative evoked potential testing is to: - Answer: Compare to post-
induction responses
The purpose of isolated amplifier inputs is to: - Answer: prevent a flow of stray currents
through connecting lines to the patient
APPHIA – Crafted with Care and Precision for Academic Excellence.
3
