CNIM ABRET EXAM QUESTIONS AND
ANSWERS
Scalp position of electrodes most critical? -
correct answer ✅Lower extremity SSEP
evoked potential has a voltage of 10 uV and the associated noise
has a voltage of 50 uV, what is the signal-to-noise ratio after 100
averaged responses? -
correct answer ✅2:1
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
If an amplifier is rated at having 120dB common mode rejection
ratio, which of the following ratios of in-phase to out-of-phase
signals would be expected? -
correct answer ✅1,000,000:1
Which of the following cranial nerves innervates the extraocular
muscles? -
correct answer ✅Abducens
,CNIM ABRET EXAM QUESTIONS AND
ANSWERS
Which of the following is an example of an SSEP far-field subcortical
potential? -
correct answer ✅N34
What is the segmental motor innervation of the peroneus longus -
correct answer ✅L4, L5, and S1
Which of the following opposes any change in current? -
correct answer ✅Inductance
The dorsal column pathways synapse at which loci on their way to
the sensory cortex? -
correct answer ✅Nucleus cuneatus and thalamus
With referential recording, maximal amplitude cortical evoked
potentials following stimulation of the left posterior tibial nerve
usually would be found between: -
correct answer ✅C3 and Cz
For preoperative posterior tibial SSEPs, which of the following
would be the best ipsilateral location for the ground electrode? -
correct answer ✅Calf
, CNIM ABRET EXAM QUESTIONS AND
ANSWERS
To record the afferent volley after posterior tibial nerve stimulation,
an electrode should be placed on the: -
correct answer ✅T5 spine
Which of the following would result in the best resolution in the
analog-to-digital converter process? -
correct answer ✅The maximal peak-to-peak signal amplitude
should match the converter range
An increase in stimulation intensity causes a linear increase of
which of the following SSEP components? -
correct answer ✅P31
Epidural electrodes are made of platinum because: -
correct answer ✅Other metals may become toxic when currents
are applied
During a median nerve preoperative study, a patient has discomfort
at the wrist. Stimulation electrodes are 10mm gold disk, stimulus
intensity is 20mA, and stimulus duration is 100uSec. Which of the
following would most likely reduce the patient's discomfort while
ANSWERS
Scalp position of electrodes most critical? -
correct answer ✅Lower extremity SSEP
evoked potential has a voltage of 10 uV and the associated noise
has a voltage of 50 uV, what is the signal-to-noise ratio after 100
averaged responses? -
correct answer ✅2:1
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
If an amplifier is rated at having 120dB common mode rejection
ratio, which of the following ratios of in-phase to out-of-phase
signals would be expected? -
correct answer ✅1,000,000:1
Which of the following cranial nerves innervates the extraocular
muscles? -
correct answer ✅Abducens
,CNIM ABRET EXAM QUESTIONS AND
ANSWERS
Which of the following is an example of an SSEP far-field subcortical
potential? -
correct answer ✅N34
What is the segmental motor innervation of the peroneus longus -
correct answer ✅L4, L5, and S1
Which of the following opposes any change in current? -
correct answer ✅Inductance
The dorsal column pathways synapse at which loci on their way to
the sensory cortex? -
correct answer ✅Nucleus cuneatus and thalamus
With referential recording, maximal amplitude cortical evoked
potentials following stimulation of the left posterior tibial nerve
usually would be found between: -
correct answer ✅C3 and Cz
For preoperative posterior tibial SSEPs, which of the following
would be the best ipsilateral location for the ground electrode? -
correct answer ✅Calf
, CNIM ABRET EXAM QUESTIONS AND
ANSWERS
To record the afferent volley after posterior tibial nerve stimulation,
an electrode should be placed on the: -
correct answer ✅T5 spine
Which of the following would result in the best resolution in the
analog-to-digital converter process? -
correct answer ✅The maximal peak-to-peak signal amplitude
should match the converter range
An increase in stimulation intensity causes a linear increase of
which of the following SSEP components? -
correct answer ✅P31
Epidural electrodes are made of platinum because: -
correct answer ✅Other metals may become toxic when currents
are applied
During a median nerve preoperative study, a patient has discomfort
at the wrist. Stimulation electrodes are 10mm gold disk, stimulus
intensity is 20mA, and stimulus duration is 100uSec. Which of the
following would most likely reduce the patient's discomfort while
