CNIM Practice Exam 1 questions and
answers
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
,CNIM Practice Exam 1 questions and
answers
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
, CNIM Practice Exam 1 questions and
answers
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
answers
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
,CNIM Practice Exam 1 questions and
answers
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
, CNIM Practice Exam 1 questions and
answers
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
