ABRET CNIM Final Exam with 100%
correctanswers Graded A+ 2024
What type of actions potentials contribute to the popliteal fossa - CORRECT both orthodromic and
antidromic
What is the neurological deficit related to the compression of the spinal cord - ANSWER:
✔✔Myelopathy
When evaluating for special considerations/contraindication for MEP monitoring, what is the most
appropriate step to be taken when identifying a pt with a previous medical history of SZs that have been
well controlled with medication - CORRECT discuss the risk with surgeon and anesthesiologist and
proceed as they wish
Creutzfeldt-Jakob disease is caused by - CORRECT Prion proteins
Which of the following is an analog to N34 - CORRECT N18
Which of the following is NOT required to be part of an IONM record - CORRECT patientsmedication
history
The most frequent source of a patient infection in the OR is derived from - CORRECT Patients own
endogenous flora
Which nerve is at greatest risk when debulking a tumor larger than 3cm in diameter during CPA surgeries
- CORRECT Facial
If an evoked potential has a voltage of 10uV and the associated noise has a voltage of 50uV, what is the
signal-tonoiseratio after 100 averaged responses? - CORRECT 2:1
,Which of the following is within the scope of practice for a CNIM - CORRECT obtain physiologicaldata
from central and peripheral nervous systems
What is the MINIMUM sampling rate for the Nyquist frequency - CORRECT More than double thefastest
frequency of the waveform
What is the most appropriate filter bandpass setting for recording the short latency median nerve SSEP -
CORRECT 30 to 3000 Hz
What modalities are ideal to run on a Chiari malformation decompression - CORRECT TCeMEPsSSEPs
BAEPs
The Nyquist frequency is based on - CORRECT sampling rate and frequency of components
MRI conditional electrodes are made from which of the following? - CORRECT Nickel titanium
What is the segmental motor innervation of the peroneus longus - CORRECT L4,L5 and S1
Subdermal needles placed in the epidural space should be placed by the - CORRECT surgeon
This cranial nerve's function is to transfer visual information form the retina to the brain - ANSWER:
✔✔optic
Impedance is the opposition to - CORRECT alternating current flow
Which of the following is a positively charged electrode - CORRECT anode
D waves are recorded from which of the following electrodes - CORRECT epidural electrodes overthe
spinal cord
,Motor nerve - CORRECT Cranial nerve 3
What neurotransmitter is released at the neuromuscular junction? - CORRECT acetylcholine
what cranial nerve is purely motor - CORRECT Oculomotor
If 100 trials are required to achieve a signal-to-noise ratio of 2:1, how many trials must be theorectically
averaged to increase the signal-to-noise ratio to 20:1? - CORRECT 10,000
What is the most frequent mode of infection transmission, which can be either direct or indirect -
CORRECT Contact
During CEA, what SSEP modality is recommended for monitoring cerebral function - ANSWER:
✔✔median
The use of IONM during scoliosis surgery may replace the - CORRECT Stagnara test
What is likely to result from a positional compression of the brachial plexus - CORRECT thoracicoutlet
syndrome
the flexion of the 4th and 5th digits of the hand would represent stimulation of the following nerve -
CORRECT ulnar nerve
Saddle area sensory loss suggest a lesion in which area - CORRECT cauda equina
what modalities should you monito for CEA surgery - CORRECT Ipsilateral EEG, Contralateral SSEP
Ratio of amplifier output voltage to input voltage - CORRECT Recording gain
, Which of the following cranial nerves is most appropriate to monitor during resection of a 4cm vestibular
schwannoma - CORRECT facial
items that contact mucous membranes or non-intact skin are semi-critical and require what level of
disinfection - CORRECT high level
when performing IOM for an intraoperative MRI case, use of electrodes that are not MRI-conditional
may result in - CORRECT Thermal burns
Alternating current is used when checking electrode impedance to - CORRECT avoid electrodepolarization
Ohm's Law - CORRECT V=IR
Damage to which structure would be MOST likely to result in motor deficits - CORRECT lateralcorticospinal
tract
If an amplifier has a common mode rejection ratio of 100:1, what is the corresponding dB - ANSWER:
✔✔40
Upper extremity SSEPs are transmitted through which spinal cord tract - CORRECT Fasciculuscuneatus
Which of the following would most affect the ability to record BAEPs - CORRECT Coagulator
What part of the spinal cord is most at risk for ischemia - CORRECT thoracic
A Babinski's sign in an adult - CORRECT Indicates an upper motor neuron lesion
which of the following frequencies is attenuated by a high frequency filter of 70Hz - CORRECT 80 Hz
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