CNIM ABRET Exam with all Correct & 100% Verified
Answers |Actual Complete Exam |Already Graded A+
in which of the following evoked potentials is the scalp position of recording electrodes most
critical? ✔Correct Answer-Lower extremitity SSEP
if an evoked potential has a voltage of 10 uV and the associated noise has a voltage of 50uV,
waht is the signal to noise ration after 100 averages 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 as 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 cranial nerves innervate the extraocular muscles? ✔Correct Answer-abducens
which is a SSEP far-field subcortical potential ✔Correct Answer-N34 (UE far-field subcortical)
what is the segmental motor innervation of the pernoeus longus? ✔Correct Answer-L4, L5, S1
what 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
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 maintaining
adequate stimulation? ✔Correct Answer-Decrease number of repetitions
Which of the following improves the signal-to-noise ratio by the square root of the number of
responses added? ✔Correct Answer-signal averaging
In BAEPs, wave I can most easily be differentiated from cochlear microphonics based upon:
✔Correct Answer-Click polarity
What is the interstimulus interval of a 50Hz click stimulus? ✔Correct Answer-20.00 msec
SSEPs recording from the scalp after electrical stimulation of the peripheral nerve are conducted
through the: ✔Correct Answer-Dorsal column on the side of the stimulation
Monitoring the posterior tibial nerve SSEPs is most appropriate in cerebrovascular procedures
involving which of the following arteries? ✔Correct Answer-Anterior cerebral
Identification of wave V of the BAEP may require: ✔Correct Answer-Decreasing stimulus
intensity
In spinal surgery, the primary purpose of the popliteal fossa recording electrode is to:
✔Correct Answer-Verify adequacy of stimulus
While performing a posterior tibial SSEP, hypothermia of the lower extremities is most likely to
cause: ✔Correct Answer-Slowed peripheral conduction velocities
Which of the following peaks in tibial nerve SSEPs is most analogous to P14 of median nerve
SSEPs? ✔Correct Answer-P31
During posterior fossa surgery, when BAEPs are used for monitoring brainstem function, it is
most important to: ✔Correct Answer-Stimulate and record from the contralateral side
Which of the following cranial nerves is most appropriate to monitor during the resection of a
4cm vestibular schwannoma? ✔Correct Answer-Facial
During a carotid endarterectomy, what SSEP modality is recommended for monitoring cerebral
function? ✔Correct Answer-Median
Answers |Actual Complete Exam |Already Graded A+
in which of the following evoked potentials is the scalp position of recording electrodes most
critical? ✔Correct Answer-Lower extremitity SSEP
if an evoked potential has a voltage of 10 uV and the associated noise has a voltage of 50uV,
waht is the signal to noise ration after 100 averages 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 as 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 cranial nerves innervate the extraocular muscles? ✔Correct Answer-abducens
which is a SSEP far-field subcortical potential ✔Correct Answer-N34 (UE far-field subcortical)
what is the segmental motor innervation of the pernoeus longus? ✔Correct Answer-L4, L5, S1
what 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
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 maintaining
adequate stimulation? ✔Correct Answer-Decrease number of repetitions
Which of the following improves the signal-to-noise ratio by the square root of the number of
responses added? ✔Correct Answer-signal averaging
In BAEPs, wave I can most easily be differentiated from cochlear microphonics based upon:
✔Correct Answer-Click polarity
What is the interstimulus interval of a 50Hz click stimulus? ✔Correct Answer-20.00 msec
SSEPs recording from the scalp after electrical stimulation of the peripheral nerve are conducted
through the: ✔Correct Answer-Dorsal column on the side of the stimulation
Monitoring the posterior tibial nerve SSEPs is most appropriate in cerebrovascular procedures
involving which of the following arteries? ✔Correct Answer-Anterior cerebral
Identification of wave V of the BAEP may require: ✔Correct Answer-Decreasing stimulus
intensity
In spinal surgery, the primary purpose of the popliteal fossa recording electrode is to:
✔Correct Answer-Verify adequacy of stimulus
While performing a posterior tibial SSEP, hypothermia of the lower extremities is most likely to
cause: ✔Correct Answer-Slowed peripheral conduction velocities
Which of the following peaks in tibial nerve SSEPs is most analogous to P14 of median nerve
SSEPs? ✔Correct Answer-P31
During posterior fossa surgery, when BAEPs are used for monitoring brainstem function, it is
most important to: ✔Correct Answer-Stimulate and record from the contralateral side
Which of the following cranial nerves is most appropriate to monitor during the resection of a
4cm vestibular schwannoma? ✔Correct Answer-Facial
During a carotid endarterectomy, what SSEP modality is recommended for monitoring cerebral
function? ✔Correct Answer-Median
