CNIM
CNIM PRACTICE EXAM 1 QUESTIONS AND ANSWERS GRADED A+
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? - correct answer
Decrease number of repetitions
What is not an advantage of epidural recordings? - correct answer Absence of
significant artifact
The stimulation rate is determined by the - correct answer analysis time
Somatosensory evoked potentials are less reliable in patients with ? - correct answer
Neuromuscular disease
When placing PTN stimulator you should not - correct answer Secure the tape and
bands around the whole ankle
,CNIM
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: - correct answer A
downward peak of 0.6V
The lumbar potential is generated from - correct answer Post-synaptic responses
The P31 response to posterior tibial nerve stimulation - correct answer Is recordable
over a generalized region of scalp
Which of the following has the greatest effect on SEP monitoring? - correct answer
Sevoflurane
A shocking sensation that occurs throughout the body during neck flexion is called
- correct answer L'Hermittes sign
Lowering the SSEP hicut filter from 500 Hz to 200 Hz may cause the cortical peaks
to: - correct answer Appear longer in latency
How many waves of a 60 Hz signal should you see in a 250 mS sweep? - correct
answer 15
Activation of an action potential of a neuron will depend on: - correct answer 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: - correct answer 9 cm medial to the left pre-auricular point
, CNIM
The most frequent source of patient infection in the operating room derives from:
- correct answer The patient's own endogenous flora
What is the maximum time in which to expect EEG changes following cross
clamping of the carotid? - correct answer Two minutes
Cranial nerve IV can be monitored using electrodes inserted into the - correct
answer Superior oblique
According to the nurses guidelines how far do you need to be from the sterile
field? - correct answer 18 inches
When no phase reversal is present in an anterior-posterior cortical grid recording:
- correct answer The maximum amplitude response is closest to the central sulcus
EEG will most likely disappear at what body temperature - correct answer 16
degrees C
Epileptiform discharges can be localized by: - correct answer A phase reversal
between two channels
Why is platinum used in epidural recordings - correct answer Other metals become
toxic when current is applied to them due to the ionic
What will most likely effect SSEPs? - correct answer Spinal cord tumor
CNIM PRACTICE EXAM 1 QUESTIONS AND ANSWERS GRADED A+
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? - correct answer
Decrease number of repetitions
What is not an advantage of epidural recordings? - correct answer Absence of
significant artifact
The stimulation rate is determined by the - correct answer analysis time
Somatosensory evoked potentials are less reliable in patients with ? - correct answer
Neuromuscular disease
When placing PTN stimulator you should not - correct answer Secure the tape and
bands around the whole ankle
,CNIM
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: - correct answer A
downward peak of 0.6V
The lumbar potential is generated from - correct answer Post-synaptic responses
The P31 response to posterior tibial nerve stimulation - correct answer Is recordable
over a generalized region of scalp
Which of the following has the greatest effect on SEP monitoring? - correct answer
Sevoflurane
A shocking sensation that occurs throughout the body during neck flexion is called
- correct answer L'Hermittes sign
Lowering the SSEP hicut filter from 500 Hz to 200 Hz may cause the cortical peaks
to: - correct answer Appear longer in latency
How many waves of a 60 Hz signal should you see in a 250 mS sweep? - correct
answer 15
Activation of an action potential of a neuron will depend on: - correct answer 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: - correct answer 9 cm medial to the left pre-auricular point
, CNIM
The most frequent source of patient infection in the operating room derives from:
- correct answer The patient's own endogenous flora
What is the maximum time in which to expect EEG changes following cross
clamping of the carotid? - correct answer Two minutes
Cranial nerve IV can be monitored using electrodes inserted into the - correct
answer Superior oblique
According to the nurses guidelines how far do you need to be from the sterile
field? - correct answer 18 inches
When no phase reversal is present in an anterior-posterior cortical grid recording:
- correct answer The maximum amplitude response is closest to the central sulcus
EEG will most likely disappear at what body temperature - correct answer 16
degrees C
Epileptiform discharges can be localized by: - correct answer A phase reversal
between two channels
Why is platinum used in epidural recordings - correct answer Other metals become
toxic when current is applied to them due to the ionic
What will most likely effect SSEPs? - correct answer Spinal cord tumor
