CNIM Practice Exam 1 Questions &
Answers | CNIM Exam Prep
2026/2027
During a median nerve preoperative study, a patient has discomfort at the wrist. Stimulation
electrodes are 10 mm gold disk, stimulus intensity is 20 mA, and stimulus duration is 100
μsec. Which of the following would most likely reduce the patient's discomfort while
maintaining adequate stimulation?
Decrease number of repetitions
What is not an advantage of epidural recordings?
Absence of significant artifact
The stimulation rate is determined by the
analysis time
Somatosensory evoked potentials are less reliable in patients with ?
Neuromuscular disease
When placing PTN stimulator you should not
Secure the tape and bands around the whole ankle
A differential amplifier with a Gain of 1,000,000 has a 0.2 μV signal at its positive input and a
0.8 μV signal at its negative input. The output will be:
A downward peak of 0.6V
The lumbar potential is generated from
Post-synaptic responses
The P31 response to posterior tibial nerve stimulation
Is recordable over a generalized region of scalp
Which of the following has the greatest effect on SEP monitoring?
Sevoflurane
,A shocking sensation that occurs throughout the body during neck flexion is called
L'Hermittes sign
Lowering the SSEP hicut filter from 500 Hz to 200 Hz may cause the cortical peaks to:
Appear longer in latency
How many waves of a 60 Hz signal should you see in a 250 mS sweep?
15
Activation of an action potential of a neuron will depend on:
Its membrane potential based on the spatiotemporal summation of its excitatory and
inhibitory inputs
From left to right pre-auricular points is measured 30 cm. The C3 electrode is located:
9 cm medial to the left pre-auricular point
The most frequent source of patient infection in the operating room derives from:
The patient's own endogenous flora
What is the maximum time in which to expect EEG changes following cross clamping of the
carotid?
Two minutes
Cranial nerve IV can be monitored using electrodes inserted into the
Superior oblique
According to the nurses guidelines how far do you need to be from the sterile field?
18 inches
When no phase reversal is present in an anterior-posterior cortical grid recording:
The maximum amplitude response is closest to the central sulcus
EEG will most likely disappear at what body temperature
16 degrees C
Epileptiform discharges can be localized by:
A phase reversal between two channels
, Why is platinum used in epidural recordings
Other metals become toxic when current is applied to them due to the ionic
What will most likely effect SSEPs?
Spinal cord tumor
Excessive cerumen may cause
Absence of the BAER
Which of the following can increase SEP amplitude?
Etomidate
Which montage would you use to confirm a change in the Cz'-Fz cortical response to PTN
stimulation?
Cpc-Cpi
CNS depressants cause:
Minimal effects in ABRs
After-discharges occur after what?
Direct cortical stimulation
An ABR has a normal wave one and then delayed wave I-V on one side. What type of
surgery is this most consistent with?
CPA Tumor
An optimal repetition rate for BAEP's is
31Hz
The input impedance of a differential amplifier should be:
At least 100 Megaohms
Lower motor neurons primarily exit the spinal cord through:
Ventral nerve roots
Answers | CNIM Exam Prep
2026/2027
During a median nerve preoperative study, a patient has discomfort at the wrist. Stimulation
electrodes are 10 mm gold disk, stimulus intensity is 20 mA, and stimulus duration is 100
μsec. Which of the following would most likely reduce the patient's discomfort while
maintaining adequate stimulation?
Decrease number of repetitions
What is not an advantage of epidural recordings?
Absence of significant artifact
The stimulation rate is determined by the
analysis time
Somatosensory evoked potentials are less reliable in patients with ?
Neuromuscular disease
When placing PTN stimulator you should not
Secure the tape and bands around the whole ankle
A differential amplifier with a Gain of 1,000,000 has a 0.2 μV signal at its positive input and a
0.8 μV signal at its negative input. The output will be:
A downward peak of 0.6V
The lumbar potential is generated from
Post-synaptic responses
The P31 response to posterior tibial nerve stimulation
Is recordable over a generalized region of scalp
Which of the following has the greatest effect on SEP monitoring?
Sevoflurane
,A shocking sensation that occurs throughout the body during neck flexion is called
L'Hermittes sign
Lowering the SSEP hicut filter from 500 Hz to 200 Hz may cause the cortical peaks to:
Appear longer in latency
How many waves of a 60 Hz signal should you see in a 250 mS sweep?
15
Activation of an action potential of a neuron will depend on:
Its membrane potential based on the spatiotemporal summation of its excitatory and
inhibitory inputs
From left to right pre-auricular points is measured 30 cm. The C3 electrode is located:
9 cm medial to the left pre-auricular point
The most frequent source of patient infection in the operating room derives from:
The patient's own endogenous flora
What is the maximum time in which to expect EEG changes following cross clamping of the
carotid?
Two minutes
Cranial nerve IV can be monitored using electrodes inserted into the
Superior oblique
According to the nurses guidelines how far do you need to be from the sterile field?
18 inches
When no phase reversal is present in an anterior-posterior cortical grid recording:
The maximum amplitude response is closest to the central sulcus
EEG will most likely disappear at what body temperature
16 degrees C
Epileptiform discharges can be localized by:
A phase reversal between two channels
, Why is platinum used in epidural recordings
Other metals become toxic when current is applied to them due to the ionic
What will most likely effect SSEPs?
Spinal cord tumor
Excessive cerumen may cause
Absence of the BAER
Which of the following can increase SEP amplitude?
Etomidate
Which montage would you use to confirm a change in the Cz'-Fz cortical response to PTN
stimulation?
Cpc-Cpi
CNS depressants cause:
Minimal effects in ABRs
After-discharges occur after what?
Direct cortical stimulation
An ABR has a normal wave one and then delayed wave I-V on one side. What type of
surgery is this most consistent with?
CPA Tumor
An optimal repetition rate for BAEP's is
31Hz
The input impedance of a differential amplifier should be:
At least 100 Megaohms
Lower motor neurons primarily exit the spinal cord through:
Ventral nerve roots
