CNIM REVIEW 2024 EXAM QUESTIONS WITH REVISED ANSWERS (ALL ARE CORRECT)
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CNIM
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CNIM
CNIM REVIEW 2024 EXAM QUESTIONS WITH REVISED ANSWERS (ALL ARE CORRECT)
The sound stimulus intensity oat the tympanic membrane depends of the:
A) acoustic coupling between the sound stimulus generator and the ear
B) Relation between SPL and teh inverse peak equivalent SPL
C) relation betw...
CNIM REVIEW 2024 EXAM QUESTIONS
WITH REVISED ANSWERS (ALL ARE
CORRECT)
The sound stimulus intensity oat the tympanic membrane depends of the:
A) acoustic coupling between the sound stimulus generator and the ear
B) Relation between SPL and teh inverse peak equivalent SPL
C) relation between SPL and the peak equivalent SPL
D) patient's hearing threshold - Answer- A) acoustic coupling between the sound
stimulus generator and the ear
Brain activity recorded directly from the cotex (ECog) is very high in amplitude and
usually requires sensitivities in the range of:
A) 10 to 50 microvolts/mm
B) 40 to 100 microvolts/mm
C) 100 to 150 microvolts/mm
D) 200 to 300 microvolts/mm - Answer- B) 40 to 100 microvolts/mm
The horizontal resolution of an evoked potential system:
A) should be 20 microseconds per data point or less
B) has no effect of the aliasing properties of the instrument
C)Should be greater than 30 miliseconds per data point
D) is one half Nyquist frequency - Answer- A) should be 20 microseconds per data point
or less
The term broadband click refers to:
A)peak acoustic power of 2-4 kHZ
,B) short peak acoustic power of 1-2 kHz
C) Broad peak acoustic power of 1-5 kHz
D) A peak acousitc power of 500 Hz- 2 kHz - Answer- `A) Peak acoustic power of 2-4
kHz
To minimize pain from the stimulation during the recording of SSEPs, the contact
impedance of the stimulator should be:
A) less than 50 ohms
B) more than 10,000 ohms
C) less than 5,000 ohms
D) less than 10 megaohms - Answer- B) less than 5,000 ohms
A secure method for applying surface cup electrodes requires:
A) application the day before surgery
B)A conductive paste and tape
C) Water resistant tape
D) collodion and compressed air - Answer- D) Collodion and compressed air
The amplitude of the cortical response to PTN SSEP stimulation is at least 80%
attenuated by:
A) Stimulation rates of 15 per second or higher
B) large doses of muscle relaxant
C) a HLF of 5000 Hz
D) A stimulation duration of greater than 150 microsec - Answer- A) Stimulation rates of
15 per second or higher
For stimulation in the MEP studies, the anode should be placed:
A) Rostral to the cathode
B) Caudal to the cathode
C) Medial to the cathode
D) Lateral to the cathode - Answer- A) Rostral to the cathode
,A stimulus pulse width that would tend to excited a larger population of motor fibers than
sensory fibers is:
A) 0.05 ms
B)0.2 ms
C) 0.5 ms
D) 1 ms - Answer- A) 0.05 ms
Vascular malformations of the posterior fossa associated with hemifacial spasm and
facial paresis may cause:
A) A loss of Wave I on the BAER
B) BAER latency abnormalities
C) Invcreased amplitudes if tubal inserts are used for stimulation
D) BAER adnormalities if the auditory cortex is involved - Answer- B) BAER latency
abnormalities
At the stage of surgical anesthesia, prop affects the BAER by:
A) increasing the latencies of waves I, III, and V without changing their amplitudes
B) Decreasing the amplitude in all waveforms
C) Causing very minimal changes
D)Abolishing all waveforms - Answer- A) increasing the latencies of waves I, III, and V
without changing their amplitudes
The surgical procedure that would have the greatest risk for changes in cardiovascular
and respiratory efforts would:
A) Involved the posterior fossa
B) be the removal of an occipital tumor
C) Be temporal lobectomy
D) Be in the area of the posterior spinal segments - Answer- A) involved the posterior
fossa
For patients showing clamp-related, EEG changes during carotid endarectomy, 80% of
the changes appear within the
A) first 10 seconds
B) first 60 seconds
C) frontal leads only
D) Alpha frequency change - Answer- B) first 60 seconds
, A patient in a state of surgical anesthesia using NO2 is likely to have a drop in SSEP
amplitudes of:
A) 50%
B) 75%
C) 30%
D) 99% - Answer- B_ 75%
Which of the following will affect the motor evoked potential the least?
A) Shunting of current by irrigation fluid
B) Muscle relaxants
C) Insertion of hardware
D) Anesthestic agents - Answer- D) Anesthetic agents
Sublaminar wires are typically used to apply what type of corrective force to the spinal
column?
A) Distraction
B) Fixation
C) Translation
D) Compression - Answer- C) translation
This short acting muscle relaxant is often used during intraoperative EMG monitoring:
A) Pancuonium
B) ethrane
C) Robinol
D) Succinylcholine - Answer- A) Pancuronium
Early changes to CMAPs during the exposure of CNVII are most likely due to:
A) An increase in inhalational agents
B) Severe blood loss
C) Changes in the patients state of conciousness
D) Heating from the electrical cautery device - Answer- D) heating from the
electrocautery device
Somatosensory Evoked Potentials are most likely to be highly variable and less reliable
in patients with:
A) multiple sclerosis
B) A history of nicotine abuse
C) A tethered spinal cord
D) Neuromuscular disease - Answer- D) Neuromuscular disease
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