CNIM 2026 LATEST 2026 TEST PAPER QUESTIONS AND
ANSWERS GRADED A+
✔✔The innermost connective tissue membrane covering the brain is the:
a) Dura
b) Pia
c) Arachnoid
d) Falx cerbri - ✔✔b) Pia
✔✔The facial nerve is cranial nerve_____and innervates the muscles of_____?
a) V; facial expression
b) VIII; eye movement
c) V; mastication
d) VII; facial expression - ✔✔d) VII; facial expression
✔✔Specral edge is a function of:
a) Delta vs time
b) Amplitude and latency vs time
c) Power vs amplitude
d) Power and frequency vs. time - ✔✔d) Power and frequency vs. time
✔✔What separates the sensory and motor cortical strips?
a) Falx cerbri
b) Sylvian fissure
c) Central sulcus
d) Frontal sulcus - ✔✔c) Central sulcus
✔✔Which of the following is NOT a safety concern regarding TCMEPs?
a) Tongue lacerations
b) History of seizure disorders
c) History of cerebral palsy
d) Pacemaker - ✔✔c) History of cerebral palsy
✔✔Which of the following drugs will increase the amplitude of cortical SSEPs?
a) Diprovan
b) Etomidate
c) Pavulon
d) Isoflurane - ✔✔b) Etomidate
,✔✔Which of the following is a reason why false negatives can occur?
a) Documentation is incomplete
b) Changes were seen and communicated to the surgeon but no postoperative deficits
were noted
c) Physiological damage occurred
d) The lesion occurs in a structure not involved in the pathways being monitored - ✔✔d)
The lesion occurs in a structure not involved in the pathways being monitored
✔✔Spinal Cord Ischemia during aortic surgery is best detected by changes in the:
a) Posterior tibial nerve SSEP
b) Median nerve SSEP
c) Tibial Nerve compound action potential
d) Lumbar potential - ✔✔a) Posterior tibial nerve SSEP
✔✔Wave III of the BAEP is generated in the:
a) Distal portion of the auditory nerve
b) Cochlea
c) Masseter
d) Lower Brainstem - ✔✔d) Lower brainstem
✔✔When monitoring the facial nerve, wire electrodes should be placed in the:
a) Masseter
b) Contralateral nasalis
c) Orbicularis oculi and orbicularis oris
d) Frontalis and masseter - ✔✔c) Orbicularis oculi and orbicularis oris
✔✔During microvascular decompression to relieve hemifacial spasm:
a) CN VI should be monitored
b) CN V should be monitored
c) CN VII should be monitored
d) CN VIII should be monitored - ✔✔c) CN VII should be monitored
✔✔A bipolar stimulator allows the surgeon to:
a) Be more specific in identifying structures
b) Stimulate larger areas
c) Use a higher stimulus intensity
d) Use a shorter stimulus duration - ✔✔a) Be more specific in identifying structures
,✔✔When sterilizing an epidural electrode, it should be considered a:
a) Semi-critical item
b) Disposable item
c) Non-Critical item
d) Critical item - ✔✔d) critical item
✔✔EP systems utilized for IOM should have:
a) a 100uA leakage limit for isolated patient connections
b) a 10 uA limit on chassis leakage
c) Both A and B
d) Neither A nor B - ✔✔d) Neither A nor B
✔✔Stimulus duration for tibial nerve SSEPs should be between?
a) 200 and 500 microseconds
b) 0.2 and 0.5 milliseconds
c) 100 and 300 microseconds
d) 0.1 and 0.3 Hz - ✔✔c) 100 and 300 microseconds
✔✔A grounding system must be available at each nonflammable anesthetizing location
such that no voltage greater than:
a) 20 uV rms at 60 hz shall be measured across an impedance of 1000 ohms
b) 20 mV rms at 60 hz shall be measured across an impedance of 1000 ohms
c) 50 mV rms at 60 hz shall be measured across an impedance fo 1000 ohms
d) 50 uV rms at 60 hz shall be measured across an impedance of 1000 ohms - ✔✔b) 20
mV rms at 60 hz shall be measured across an impedance of 1000 ohms
✔✔The system bandpass for recording FACIAL NERVE EMG should be:
a) 1-30 to 16,000 Hz
b) 1-250 to 1,500 Hz
c) 10-30 to 250-3000hz
d) 1-250 to 1000ms - ✔✔a) 1-30 to 16,000 Hz
✔✔The system bandpass for recording CORTICAL SSEPs should be:
a) 1-30 to 250-1000hz
b) 10-30 to 1500ms
c) 10-30 to 250-3000hz
d) 1-250 to 1000ms - ✔✔a) 1-30 to 250-1000hz
, ✔✔How might you best decrease stimulus artifact while recording BAEPs
intraoperatively?
a) Use rarefaction clicks
b) Use tone pips
c) Use condensation clicks
d) Use clicks of alternating polarity - ✔✔d) Use clicks of alternating polarity
✔✔A patient present for an L1 burst fracture repair. What is the most appropriate
monitoring protocol?
a) Tibial and auditory nerves
b) Median and ulnar nerves
c) Tibial and median nerves
d) Tibial and peroneal nerves - ✔✔c) Tibial and median nerves
✔✔At the stage of surgical anesthesia, propofol affects the BAEPs by:
a) Dramatically increasing all absolute latencies
b) Decreasing all waveform amplitudes
c) Aboloshing all waveforms
d) Causing minimal changes - ✔✔d) Causing minimal changes
✔✔A wave III to V interpeak latency increase can be indictive of a lesion in:
a) the distal portion of cranial nerve VIII
b) between the distal portion of the nerve and the pons
c) Between the pons and the upper brainstem
d) The middle ear - ✔✔c) Between the pons and the upper brainstem
✔✔Efferent pathways:
a) Conduct impulses from the CNS to the peripheral nerves
b) Are motor pathways
c) are sensory pathways
d) Both A and B - ✔✔d) Both A and B
✔✔If a sound intensity is increased from 20dB to 40dB, then the sound has increased
by a factor of:
a) 2
b) 10
c) 20
d) 100 - ✔✔a) 2
ANSWERS GRADED A+
✔✔The innermost connective tissue membrane covering the brain is the:
a) Dura
b) Pia
c) Arachnoid
d) Falx cerbri - ✔✔b) Pia
✔✔The facial nerve is cranial nerve_____and innervates the muscles of_____?
a) V; facial expression
b) VIII; eye movement
c) V; mastication
d) VII; facial expression - ✔✔d) VII; facial expression
✔✔Specral edge is a function of:
a) Delta vs time
b) Amplitude and latency vs time
c) Power vs amplitude
d) Power and frequency vs. time - ✔✔d) Power and frequency vs. time
✔✔What separates the sensory and motor cortical strips?
a) Falx cerbri
b) Sylvian fissure
c) Central sulcus
d) Frontal sulcus - ✔✔c) Central sulcus
✔✔Which of the following is NOT a safety concern regarding TCMEPs?
a) Tongue lacerations
b) History of seizure disorders
c) History of cerebral palsy
d) Pacemaker - ✔✔c) History of cerebral palsy
✔✔Which of the following drugs will increase the amplitude of cortical SSEPs?
a) Diprovan
b) Etomidate
c) Pavulon
d) Isoflurane - ✔✔b) Etomidate
,✔✔Which of the following is a reason why false negatives can occur?
a) Documentation is incomplete
b) Changes were seen and communicated to the surgeon but no postoperative deficits
were noted
c) Physiological damage occurred
d) The lesion occurs in a structure not involved in the pathways being monitored - ✔✔d)
The lesion occurs in a structure not involved in the pathways being monitored
✔✔Spinal Cord Ischemia during aortic surgery is best detected by changes in the:
a) Posterior tibial nerve SSEP
b) Median nerve SSEP
c) Tibial Nerve compound action potential
d) Lumbar potential - ✔✔a) Posterior tibial nerve SSEP
✔✔Wave III of the BAEP is generated in the:
a) Distal portion of the auditory nerve
b) Cochlea
c) Masseter
d) Lower Brainstem - ✔✔d) Lower brainstem
✔✔When monitoring the facial nerve, wire electrodes should be placed in the:
a) Masseter
b) Contralateral nasalis
c) Orbicularis oculi and orbicularis oris
d) Frontalis and masseter - ✔✔c) Orbicularis oculi and orbicularis oris
✔✔During microvascular decompression to relieve hemifacial spasm:
a) CN VI should be monitored
b) CN V should be monitored
c) CN VII should be monitored
d) CN VIII should be monitored - ✔✔c) CN VII should be monitored
✔✔A bipolar stimulator allows the surgeon to:
a) Be more specific in identifying structures
b) Stimulate larger areas
c) Use a higher stimulus intensity
d) Use a shorter stimulus duration - ✔✔a) Be more specific in identifying structures
,✔✔When sterilizing an epidural electrode, it should be considered a:
a) Semi-critical item
b) Disposable item
c) Non-Critical item
d) Critical item - ✔✔d) critical item
✔✔EP systems utilized for IOM should have:
a) a 100uA leakage limit for isolated patient connections
b) a 10 uA limit on chassis leakage
c) Both A and B
d) Neither A nor B - ✔✔d) Neither A nor B
✔✔Stimulus duration for tibial nerve SSEPs should be between?
a) 200 and 500 microseconds
b) 0.2 and 0.5 milliseconds
c) 100 and 300 microseconds
d) 0.1 and 0.3 Hz - ✔✔c) 100 and 300 microseconds
✔✔A grounding system must be available at each nonflammable anesthetizing location
such that no voltage greater than:
a) 20 uV rms at 60 hz shall be measured across an impedance of 1000 ohms
b) 20 mV rms at 60 hz shall be measured across an impedance of 1000 ohms
c) 50 mV rms at 60 hz shall be measured across an impedance fo 1000 ohms
d) 50 uV rms at 60 hz shall be measured across an impedance of 1000 ohms - ✔✔b) 20
mV rms at 60 hz shall be measured across an impedance of 1000 ohms
✔✔The system bandpass for recording FACIAL NERVE EMG should be:
a) 1-30 to 16,000 Hz
b) 1-250 to 1,500 Hz
c) 10-30 to 250-3000hz
d) 1-250 to 1000ms - ✔✔a) 1-30 to 16,000 Hz
✔✔The system bandpass for recording CORTICAL SSEPs should be:
a) 1-30 to 250-1000hz
b) 10-30 to 1500ms
c) 10-30 to 250-3000hz
d) 1-250 to 1000ms - ✔✔a) 1-30 to 250-1000hz
, ✔✔How might you best decrease stimulus artifact while recording BAEPs
intraoperatively?
a) Use rarefaction clicks
b) Use tone pips
c) Use condensation clicks
d) Use clicks of alternating polarity - ✔✔d) Use clicks of alternating polarity
✔✔A patient present for an L1 burst fracture repair. What is the most appropriate
monitoring protocol?
a) Tibial and auditory nerves
b) Median and ulnar nerves
c) Tibial and median nerves
d) Tibial and peroneal nerves - ✔✔c) Tibial and median nerves
✔✔At the stage of surgical anesthesia, propofol affects the BAEPs by:
a) Dramatically increasing all absolute latencies
b) Decreasing all waveform amplitudes
c) Aboloshing all waveforms
d) Causing minimal changes - ✔✔d) Causing minimal changes
✔✔A wave III to V interpeak latency increase can be indictive of a lesion in:
a) the distal portion of cranial nerve VIII
b) between the distal portion of the nerve and the pons
c) Between the pons and the upper brainstem
d) The middle ear - ✔✔c) Between the pons and the upper brainstem
✔✔Efferent pathways:
a) Conduct impulses from the CNS to the peripheral nerves
b) Are motor pathways
c) are sensory pathways
d) Both A and B - ✔✔d) Both A and B
✔✔If a sound intensity is increased from 20dB to 40dB, then the sound has increased
by a factor of:
a) 2
b) 10
c) 20
d) 100 - ✔✔a) 2
