CNIM PRACTICE EXAM 2 -Certified in Neurophysiologic
Intraoperative Monitoring EXAM 2026-2027 LATEST UPDATED
VERSION 250 QUESTIONS AND ANSWERS JUST RELEASED
Which of the following evoked potentials is least changed by anesthesia?
1 Auditory
2 Somatosensory
3 Visual
4 Electroencephalography - answer>>Auditory
Which is the most critical stage of scoliosis surgery?
1 Exposure
2 De-rotation
3 Placement of crosslinks
4 Closure - answer>>De-rotation
Changing from standard headphones to foam insert transducers connected by plastic tubing will change
the latency of wave 1 by about:
1 -0.5 msec
2 +0.5 msec
3 +0.9 msec
4 +2 msec - answer>>+0.9 msec
During the recording of somatosensory evoked responses in the OR, electromyographic artifact may be
reduced by:
1 Neruomuscular blocking agents
2 Changing stimulation sites
3 Inc the duration of the stimulus
4 Inc stimulus intensity - answer>>Neuromuscular blocking agents
,The ulnar nerve is formed at spinal levels:
1 C1-2
2 C2-4
3 C5-T1
4 C7-T1 - answer>>C7-T1
Spondylosis is:
1 Forward movement of the body of one of the lower vertebrae on the vertebra below it, or upon the
sacrum
2 Degeneration of the spine
3 Neurofibromatosis
4 Deterioration of the spinal cord grey matter which is replaced by a large cyst - answer>>Degeneration
of the spine
The monitoring modality most likely to be affected by a large bolus of muscle relaxant is the:
1 Cortical SSEP
2 BAEP
3 Myogenic evoked potential
4 NMEP - answer>>Myogenic evoked potential
BAEP rarefraction clicks from the transducer causes:
1 Movement of the tympanic membrane toward the cochlea
2 Movement of the tympanic membrane away from the cochlea
3 Movement toward and away from the cochlea
4 Elimination of stimulus artifact - answer>>Movement of the tympanic membrane away from the
cochlea
Which describes a semi-critical infections device?
1 Requires no disinfection after each use
2 Requires low level disinfection after each
,3 Requires high to intermediate disinfection after each use
4 Requires sterilization after each use - answer>>Requires high to intermediate disinfection after each
use
The median nerve SSEP can be helpful as a measure of:
1 Cerebral blood flow
2 Lower spinal cord function
3 Blood pressure variability
4 Anesthetic dosage - answer>>Cerebral blood flow
In general, filter settings for SSEP recordings:
1 Can be narrower for cortical than peripheral responses
2 Can be narrower for peripheral than cortical responses
3 Should always include 60 Hz band pass filters
4 Should always be 30-3000 Hz - answer>>Can be narrower for cortical than peripheral responses
The BAEP electrode montage would include:
1 Cz, A1, A2
2 CP3, CP4, Cpz
3 Fpz, CP4, CPz
4 M1, M2, Oz - answer>>Cz, A1, A2
What should you do if a pedicle screw tests above the accepted threshold?
1 Inform the surgeon of a possible breach of the pedicle
2 Check the stimulator for possible failure
3 Ask anesthesia to reduce the inhalational agents
4 Inform the surgeon of an acceptable screw value - answer>>Inform the surgeon of an acceptable
screw value
, The duration of a monophasic, rectangular pulse used for SSEP stimulation should be:
1 0.05 ms
2 0.2ms-0.3ms
3 0.7ms-1.0ms
4 10 ms - answer>>0.2ms-0.3ms
The type of pathology that would change the BAEP interpeak latencies the greatest is:
1 Pathology in the middle ear
2 Pathology in the cochlea
3 Pathology of the XII cranial nerve
4 Pathology of the VIII cranial nerve - answer>>Pathology of the VIII cranial nerve
Preoperative baselines, SSEP values are essential to intraoperative neruophysiological monitoring bc:
1 Latencies and amplitudes are highly variable
2 It is necessary to compare intraoperative values with laboratory normative data
3 Absolute boundaries for EPs obtained intraoperatively are not available
4 They help to establish the appropriate level of anesthesia - answer>>Absolute boundaries for EPs
obtained intraoperatively are not available
If not specified, most reports on BAEP are displayed:
1 Vertex positive up
2 Vertex positive down
3 Negativity up
4 Using "N" plus a number to designate a wave - answer>>Vertex positive up
The gain of an amplifier, set to give an output signal of 1 volt for an input signal of 10uV, is:
1 100
2 1,000
3 10,000
Intraoperative Monitoring EXAM 2026-2027 LATEST UPDATED
VERSION 250 QUESTIONS AND ANSWERS JUST RELEASED
Which of the following evoked potentials is least changed by anesthesia?
1 Auditory
2 Somatosensory
3 Visual
4 Electroencephalography - answer>>Auditory
Which is the most critical stage of scoliosis surgery?
1 Exposure
2 De-rotation
3 Placement of crosslinks
4 Closure - answer>>De-rotation
Changing from standard headphones to foam insert transducers connected by plastic tubing will change
the latency of wave 1 by about:
1 -0.5 msec
2 +0.5 msec
3 +0.9 msec
4 +2 msec - answer>>+0.9 msec
During the recording of somatosensory evoked responses in the OR, electromyographic artifact may be
reduced by:
1 Neruomuscular blocking agents
2 Changing stimulation sites
3 Inc the duration of the stimulus
4 Inc stimulus intensity - answer>>Neuromuscular blocking agents
,The ulnar nerve is formed at spinal levels:
1 C1-2
2 C2-4
3 C5-T1
4 C7-T1 - answer>>C7-T1
Spondylosis is:
1 Forward movement of the body of one of the lower vertebrae on the vertebra below it, or upon the
sacrum
2 Degeneration of the spine
3 Neurofibromatosis
4 Deterioration of the spinal cord grey matter which is replaced by a large cyst - answer>>Degeneration
of the spine
The monitoring modality most likely to be affected by a large bolus of muscle relaxant is the:
1 Cortical SSEP
2 BAEP
3 Myogenic evoked potential
4 NMEP - answer>>Myogenic evoked potential
BAEP rarefraction clicks from the transducer causes:
1 Movement of the tympanic membrane toward the cochlea
2 Movement of the tympanic membrane away from the cochlea
3 Movement toward and away from the cochlea
4 Elimination of stimulus artifact - answer>>Movement of the tympanic membrane away from the
cochlea
Which describes a semi-critical infections device?
1 Requires no disinfection after each use
2 Requires low level disinfection after each
,3 Requires high to intermediate disinfection after each use
4 Requires sterilization after each use - answer>>Requires high to intermediate disinfection after each
use
The median nerve SSEP can be helpful as a measure of:
1 Cerebral blood flow
2 Lower spinal cord function
3 Blood pressure variability
4 Anesthetic dosage - answer>>Cerebral blood flow
In general, filter settings for SSEP recordings:
1 Can be narrower for cortical than peripheral responses
2 Can be narrower for peripheral than cortical responses
3 Should always include 60 Hz band pass filters
4 Should always be 30-3000 Hz - answer>>Can be narrower for cortical than peripheral responses
The BAEP electrode montage would include:
1 Cz, A1, A2
2 CP3, CP4, Cpz
3 Fpz, CP4, CPz
4 M1, M2, Oz - answer>>Cz, A1, A2
What should you do if a pedicle screw tests above the accepted threshold?
1 Inform the surgeon of a possible breach of the pedicle
2 Check the stimulator for possible failure
3 Ask anesthesia to reduce the inhalational agents
4 Inform the surgeon of an acceptable screw value - answer>>Inform the surgeon of an acceptable
screw value
, The duration of a monophasic, rectangular pulse used for SSEP stimulation should be:
1 0.05 ms
2 0.2ms-0.3ms
3 0.7ms-1.0ms
4 10 ms - answer>>0.2ms-0.3ms
The type of pathology that would change the BAEP interpeak latencies the greatest is:
1 Pathology in the middle ear
2 Pathology in the cochlea
3 Pathology of the XII cranial nerve
4 Pathology of the VIII cranial nerve - answer>>Pathology of the VIII cranial nerve
Preoperative baselines, SSEP values are essential to intraoperative neruophysiological monitoring bc:
1 Latencies and amplitudes are highly variable
2 It is necessary to compare intraoperative values with laboratory normative data
3 Absolute boundaries for EPs obtained intraoperatively are not available
4 They help to establish the appropriate level of anesthesia - answer>>Absolute boundaries for EPs
obtained intraoperatively are not available
If not specified, most reports on BAEP are displayed:
1 Vertex positive up
2 Vertex positive down
3 Negativity up
4 Using "N" plus a number to designate a wave - answer>>Vertex positive up
The gain of an amplifier, set to give an output signal of 1 volt for an input signal of 10uV, is:
1 100
2 1,000
3 10,000
