CNIM TEST with all Correct & 100% Verified Answers |
Actual Complete Exam |Already Graded A+
In BAEP's, cochlear nucleus lesion causes? ✔Correct Answer-Increased III-V, increased I-V
Which modality is most useful in monitoring the integrity of the corticospinal tracts during
resection of an intramedullary spinal cord tumor? ✔Correct Answer-D-Waves
The stimulus used in a brainstem auditory evoked potential study is a click with a peak acoustic
power in the range of ✔Correct Answer-2000 to 4000Hz
Which of the following tibial nerve responses is not a near field response? ✔Correct Answer-
N31
How many amperes of current will flow in a circuit containing a 2V battery and 10 ohms of
resistance? ✔Correct Answer-0.2 amps
In BAEP's blood, betadine or irrigation fluid in tubing causes: ✔Correct Answer-Increase in
absolute latency, normal inter-peak latencies
In averaging, the period of analysis is called _______ or ________. ✔Correct Answer-Epoch,
sweep length
While monitoring BAEP, there was a prolongation of wave I through V by more than 2 msec.
Which of the following choices is NOT a possible cause? ✔Correct Answer-Increase of
isoflurane anesthesia
Involuntary movement ✔Correct Answer-Ataxia
Smaller surface of stimulating electrodes: ✔Correct Answer-Higher Current Density
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
P100 of a VEP will have the highest amplitude in which derivation? ✔Correct Answer-MO-Fz
Cranial nerve VII must be monitored concurrently with BAERs. ✔Correct Answer-True
Nerves of the body, such as median, ulnar, and femoral are formed from the: ✔Correct
Answer-Dorsal and ventral rami
Upper motor neuron extends from: ✔Correct Answer-Precentral gyrus to ventral horn
,Increasing the stimulus rate of BAEPs ✔Correct Answer-Decreases amplitude and increases
latency
Which of the following is the normal interocular latency difference of P100? ✔Correct
Answer-Less than 15 msec
An amplifier sensitivity setting that produces a vertical deflection of 1cm with an input of 10mV
is: ✔Correct Answer-1mV/mm
When identifying wave IV and V of a BAEP, which of the following would be most helpful?
✔Correct Answer-Cz-Contra ear montage
The maximum leakage current should be ✔Correct Answer-100 uA
Wave V is usually the most prominent peak after ✔Correct Answer-5.5 msec
Which of the following montages will best demonstrate waves I through V of the BAEP?
✔Correct Answer-Cz-ipsilateral ear
P13 Generator ✔Correct Answer-Spinomedullary junction
An electrode recording from Erb's point is placed ✔Correct Answer-2-3 cm above the clavicle
In BAEP's, perforated or hardened tympanic membrane causes: ✔Correct Answer-Increase in
absolute latency, normal inter-peak latencies
Which of the following temperatures should be annotated as being hypothermic? ✔Correct
Answer-34 degrees C
Dyskinesia: ✔Correct Answer-Abnormal Movement
Sensory supply of the posterior 1/3rd of the tongue is from which nerve? ✔Correct Answer-
Glossopharyngeal
What is the best montage for distinguishing a IV/V complex? ✔Correct Answer-Cz-Contra Ear
Loss of a unilateral waveform is never a concern as long as wave V is present on the other ear.
✔Correct Answer-False
Which of the following are thalamic nuclei for the somatosensory pathway? ✔Correct
Answer-VPL nucleus
, What does an increased N13-N20 central conduction time with normal N9-N20 conduction time
and a normal nerve conduction velocity indicate? ✔Correct Answer-Defect above the lower
medulla at or below the somatosensory cortex
The effect of hypotension on the evoked potential is: ✔Correct Answer-Decreased amplitude,
increased latency
Using an amplification factor of 500,000, a 1uV brainstem auditory evoked potential waveform
will be amplified to ✔Correct Answer-0.50v
Which of the following monitoring modes is LEAST useful for skull base surgery? ✔Correct
Answer-Tibial nerve SSEP
Which surgical approach will sacrifice hearing? ✔Correct Answer-Translabyrinthine
Which muscle is innervated by L4-S1 nerve roots? ✔Correct Answer-Tibialis anterior
Selective dorsal rhizotomy: ✔Correct Answer-Reduces spasticity
The fibers anterior to the chiasm in the visual pathway are called: ✔Correct Answer-Optic
nerves
During posterior fossa surgery, wave V of the BAEPs may increase in latency due to: ✔Correct
Answer-Retraction of the cerebellum
When is it most appropriate to alert the surgical team of a problem with the monitoring?
✔Correct Answer-After a loss of 55% amplitude
If the distance between a patient and a pattern generator is reduced by one-half, the angle at
the eye subtended by each check is ✔Correct Answer-Increased two times
In VEP we are testing ___________ vision, not ____________ vision. ✔Correct Answer-
Central, periphial
Posterior Fossa ✔Correct Answer-Brainstem
EEG electrodes during IONM should have impedances that range from: ✔Correct Answer-
1000 to 5000 ohms
All components of brainstem auditory evoked potential waveforms reach adult configuratiion by
what age? ✔Correct Answer-3-6 months
Which of the following evoked potential tests would have the lowest rate of abnormality in
patients with MS? ✔Correct Answer-BAEP
Actual Complete Exam |Already Graded A+
In BAEP's, cochlear nucleus lesion causes? ✔Correct Answer-Increased III-V, increased I-V
Which modality is most useful in monitoring the integrity of the corticospinal tracts during
resection of an intramedullary spinal cord tumor? ✔Correct Answer-D-Waves
The stimulus used in a brainstem auditory evoked potential study is a click with a peak acoustic
power in the range of ✔Correct Answer-2000 to 4000Hz
Which of the following tibial nerve responses is not a near field response? ✔Correct Answer-
N31
How many amperes of current will flow in a circuit containing a 2V battery and 10 ohms of
resistance? ✔Correct Answer-0.2 amps
In BAEP's blood, betadine or irrigation fluid in tubing causes: ✔Correct Answer-Increase in
absolute latency, normal inter-peak latencies
In averaging, the period of analysis is called _______ or ________. ✔Correct Answer-Epoch,
sweep length
While monitoring BAEP, there was a prolongation of wave I through V by more than 2 msec.
Which of the following choices is NOT a possible cause? ✔Correct Answer-Increase of
isoflurane anesthesia
Involuntary movement ✔Correct Answer-Ataxia
Smaller surface of stimulating electrodes: ✔Correct Answer-Higher Current Density
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
P100 of a VEP will have the highest amplitude in which derivation? ✔Correct Answer-MO-Fz
Cranial nerve VII must be monitored concurrently with BAERs. ✔Correct Answer-True
Nerves of the body, such as median, ulnar, and femoral are formed from the: ✔Correct
Answer-Dorsal and ventral rami
Upper motor neuron extends from: ✔Correct Answer-Precentral gyrus to ventral horn
,Increasing the stimulus rate of BAEPs ✔Correct Answer-Decreases amplitude and increases
latency
Which of the following is the normal interocular latency difference of P100? ✔Correct
Answer-Less than 15 msec
An amplifier sensitivity setting that produces a vertical deflection of 1cm with an input of 10mV
is: ✔Correct Answer-1mV/mm
When identifying wave IV and V of a BAEP, which of the following would be most helpful?
✔Correct Answer-Cz-Contra ear montage
The maximum leakage current should be ✔Correct Answer-100 uA
Wave V is usually the most prominent peak after ✔Correct Answer-5.5 msec
Which of the following montages will best demonstrate waves I through V of the BAEP?
✔Correct Answer-Cz-ipsilateral ear
P13 Generator ✔Correct Answer-Spinomedullary junction
An electrode recording from Erb's point is placed ✔Correct Answer-2-3 cm above the clavicle
In BAEP's, perforated or hardened tympanic membrane causes: ✔Correct Answer-Increase in
absolute latency, normal inter-peak latencies
Which of the following temperatures should be annotated as being hypothermic? ✔Correct
Answer-34 degrees C
Dyskinesia: ✔Correct Answer-Abnormal Movement
Sensory supply of the posterior 1/3rd of the tongue is from which nerve? ✔Correct Answer-
Glossopharyngeal
What is the best montage for distinguishing a IV/V complex? ✔Correct Answer-Cz-Contra Ear
Loss of a unilateral waveform is never a concern as long as wave V is present on the other ear.
✔Correct Answer-False
Which of the following are thalamic nuclei for the somatosensory pathway? ✔Correct
Answer-VPL nucleus
, What does an increased N13-N20 central conduction time with normal N9-N20 conduction time
and a normal nerve conduction velocity indicate? ✔Correct Answer-Defect above the lower
medulla at or below the somatosensory cortex
The effect of hypotension on the evoked potential is: ✔Correct Answer-Decreased amplitude,
increased latency
Using an amplification factor of 500,000, a 1uV brainstem auditory evoked potential waveform
will be amplified to ✔Correct Answer-0.50v
Which of the following monitoring modes is LEAST useful for skull base surgery? ✔Correct
Answer-Tibial nerve SSEP
Which surgical approach will sacrifice hearing? ✔Correct Answer-Translabyrinthine
Which muscle is innervated by L4-S1 nerve roots? ✔Correct Answer-Tibialis anterior
Selective dorsal rhizotomy: ✔Correct Answer-Reduces spasticity
The fibers anterior to the chiasm in the visual pathway are called: ✔Correct Answer-Optic
nerves
During posterior fossa surgery, wave V of the BAEPs may increase in latency due to: ✔Correct
Answer-Retraction of the cerebellum
When is it most appropriate to alert the surgical team of a problem with the monitoring?
✔Correct Answer-After a loss of 55% amplitude
If the distance between a patient and a pattern generator is reduced by one-half, the angle at
the eye subtended by each check is ✔Correct Answer-Increased two times
In VEP we are testing ___________ vision, not ____________ vision. ✔Correct Answer-
Central, periphial
Posterior Fossa ✔Correct Answer-Brainstem
EEG electrodes during IONM should have impedances that range from: ✔Correct Answer-
1000 to 5000 ohms
All components of brainstem auditory evoked potential waveforms reach adult configuratiion by
what age? ✔Correct Answer-3-6 months
Which of the following evoked potential tests would have the lowest rate of abnormality in
patients with MS? ✔Correct Answer-BAEP
