CNIM Section II Exam Questions &
Answers (Grade A+)
An objective measure of meaningful change to use to warn the
surgeon is the -
correct answer ✅50% amplitude decrease.
D-Wave amplitude_ and latency as you move caudally down the
spinal cord. -
correct answer ✅decreases, increases
Where is the BAEP wave V generated? -
correct answer ✅Midbrain
Electrocochleogram (EcochG) -
correct answer ✅All are correct
The absence of N20 obligate waveform may reflect a -
correct answer ✅Subcortical lesion of the ascending
somatosensory pathway
What is the effect of nerve ischemia on EMG? -
correct answer ✅No detectible EMG activity
,CNIM Section II Exam Questions &
Answers (Grade A+)
The stimulation rate most suitable for tibial SSEP monitoring is: -
correct answer ✅2.1 Hz.
According to the ACNS guidelines, what is the most appropriate
repetition rate for SSEP stimulation? -
correct answer ✅2-8/sec
Contralateral masking should be used during BAEP monitoring to: -
correct answer ✅Prevent crossover responses
Which cranial nerves are at greatest risk of injury during a
retrosigmoid acoustic neuroma surgical approach? -
correct answer ✅CN 7 and 8
According to ACNS Guidelines, which of the following will result in
reduction of stimulus artifact and rapid acquisition of data? -
correct answer ✅Alternating polarity and a stimulus rate of 30.1
p/sec.
When monitoring from external anal sphincter, where should
electrodes be placed? -
,CNIM Section II Exam Questions &
Answers (Grade A+)
correct answer ✅2 finger breadths laterally from the edge of the
rectum
If you have noise in ALL SSEP channels, replacing which electrode
would be most beneficial? -
correct answer ✅Ground electrode
A risk associated with mapping of the motor cortex is -
correct answer ✅Seizures
During pre-operative posterior tibial nerve somatosensory evoked
potentials, which of the following would be the best ipsilateral
location for the ground electrode? -
correct answer ✅Calf
To display median nerve SSEP response as an upward deflection,
which of the following must be known? -
correct answer ✅Waveform polarity and polarity convention of
the amplifier inputs
, CNIM Section II Exam Questions &
Answers (Grade A+)
During carotid endarterectomy, Spectral Edge Frequency is usually
set to -
correct answer ✅90%-97%
Which of the following anesthetic agents may increase the
amplitude of cortical potentials? -
correct answer ✅Etomidate
Cervicomedullary signal -
correct answer ✅P31
In a full-field pattern reversal VEP, the maximal response is seen at:
-
correct answer ✅MO
Due to immature myelination and smaller neural fibers, children
may require to obtain TCEMEP responses. -
correct answer ✅Answer: A higher stimulation intensity
An EEG frequency of 4-7 Hz -
correct answer ✅Theta
Answers (Grade A+)
An objective measure of meaningful change to use to warn the
surgeon is the -
correct answer ✅50% amplitude decrease.
D-Wave amplitude_ and latency as you move caudally down the
spinal cord. -
correct answer ✅decreases, increases
Where is the BAEP wave V generated? -
correct answer ✅Midbrain
Electrocochleogram (EcochG) -
correct answer ✅All are correct
The absence of N20 obligate waveform may reflect a -
correct answer ✅Subcortical lesion of the ascending
somatosensory pathway
What is the effect of nerve ischemia on EMG? -
correct answer ✅No detectible EMG activity
,CNIM Section II Exam Questions &
Answers (Grade A+)
The stimulation rate most suitable for tibial SSEP monitoring is: -
correct answer ✅2.1 Hz.
According to the ACNS guidelines, what is the most appropriate
repetition rate for SSEP stimulation? -
correct answer ✅2-8/sec
Contralateral masking should be used during BAEP monitoring to: -
correct answer ✅Prevent crossover responses
Which cranial nerves are at greatest risk of injury during a
retrosigmoid acoustic neuroma surgical approach? -
correct answer ✅CN 7 and 8
According to ACNS Guidelines, which of the following will result in
reduction of stimulus artifact and rapid acquisition of data? -
correct answer ✅Alternating polarity and a stimulus rate of 30.1
p/sec.
When monitoring from external anal sphincter, where should
electrodes be placed? -
,CNIM Section II Exam Questions &
Answers (Grade A+)
correct answer ✅2 finger breadths laterally from the edge of the
rectum
If you have noise in ALL SSEP channels, replacing which electrode
would be most beneficial? -
correct answer ✅Ground electrode
A risk associated with mapping of the motor cortex is -
correct answer ✅Seizures
During pre-operative posterior tibial nerve somatosensory evoked
potentials, which of the following would be the best ipsilateral
location for the ground electrode? -
correct answer ✅Calf
To display median nerve SSEP response as an upward deflection,
which of the following must be known? -
correct answer ✅Waveform polarity and polarity convention of
the amplifier inputs
, CNIM Section II Exam Questions &
Answers (Grade A+)
During carotid endarterectomy, Spectral Edge Frequency is usually
set to -
correct answer ✅90%-97%
Which of the following anesthetic agents may increase the
amplitude of cortical potentials? -
correct answer ✅Etomidate
Cervicomedullary signal -
correct answer ✅P31
In a full-field pattern reversal VEP, the maximal response is seen at:
-
correct answer ✅MO
Due to immature myelination and smaller neural fibers, children
may require to obtain TCEMEP responses. -
correct answer ✅Answer: A higher stimulation intensity
An EEG frequency of 4-7 Hz -
correct answer ✅Theta
