CNIM EXAMS BUNDLED PACK 2025/2026
COMPLETE QUESTIONS AND VERIFIED
DETAILED SOLUTIONS || 100%
GUARANTEED PASS <LATEST VERSION>
Domain 1: Instrumentation and Setup
1. What is the primary purpose of electrode impedance testing?
A) To measure the amplitude of the signal
B) To ensure good electrical contact between the electrode and the skin
C) To determine the stimulation intensity
D) To filter out 60 Hz noise
B) To ensure good electrical contact between the electrode and the skin
2. A 60 Hz "hum" is most likely caused by:
A) ECG artifact
B) Poor electrode impedance
C) Power line interference
D) EMG activity from patient movement
C) Power line interference
3. The bandpass filter setting that would be most appropriate for recording
Somatosensory Evoked Potentials (SSEPs) is:
A) 1-30 Hz
B) 10-100 Hz
C) 30-300 Hz
D) 100-3000 Hz
C) 30-300 Hz
4. Which type of electrode is typically used for recording transcranial motor evoked
potentials (TcMEPs)?
A) Subdermal needle electrodes
B) Cup electrodes
C) Corkscrew electrodes
, D) Disc electrodes
A) Subdermal needle electrodes
5. The "Notch" filter is used to eliminate:
A) High-frequency electrocautery artifact
B) Low-frequency drift
C) Power line frequency (e.g., 50/60 Hz)
D) Muscle artifact
C) Power line frequency (e.g., 50/60 Hz)
6. For upper extremity SSEPs, the Erb's point electrode primarily records:
A) N13 subcortical potential
B) P9 far-field potential
C) The compound nerve action potential (CNAP)
D) N20 cortical potential
C) The compound nerve action potential (CNAP)
7. What is the standard international system for EEG electrode placement?
A) 10-20 System
B) 10-10 System
C) Mayo System
D) International Bipolar System
A) 10-20 System
8. A stimulus duration of 0.2 ms is typically used for:
A) Brainstem Auditory Evoked Potentials (BAEPs)
B) Somatosensory Evoked Potentials (SSEPs)
C) Transcranial Motor Evoked Potentials (TcMEPs)
D) Visual Evoked Potentials (VEPs)
B) Somatosensory Evoked Potentials (SSEPs)
9. Which montage is most commonly used for recording BAEPs?
A) Ipsilateral Ear to Contralateral Ear
B) Cz to Ai (ipsilateral ear)
C) Cz to Cc (contralateral cortex)
D) Fz to Ai (ipsilateral ear)
B) Cz to Ai (ipsilateral ear)
10. The ground electrode for IONM should be placed:
A) Between the stimulating and recording electrodes
, B) On the forehead
C) On the shoulder ipsilateral to stimulation
D) On the contralateral limb
A) Between the stimulating and recording electrodes
Domain 2: Somatosensory Evoked Potentials (SSEPs)
11. The N20 cortical peak recorded over the scalp following median nerve stimulation is
generated primarily in:
A) Thalamus
B) Primary motor cortex
C) Primary somatosensory cortex
D) Brachial plexus
C) Primary somatosensory cortex
12. A significant and persistent decrease in SSEP amplitude (>50%) is most indicative of:
A) Peripheral nerve ischemia
B) Anesthetic effects
C) Compromise of the dorsal columns
D) Hypothermia
C) Compromise of the dorsal columns
13. The P37 potential, elicited by posterior tibial nerve stimulation, is best recorded over
which scalp location?
A) C3' (contralateral)
B) C4' (contralateral)
C) Cz'
D) Fpz
C) Cz'
14. Which anesthetic agent has the LEAST suppressive effect on cortical SSEPs?
A) Propofol
B) Volatile inhalants (e.g., Isoflurane)
C) Nitrous Oxide
D) Opioids (e.g., Fentanyl)
D) Opioids (e.g., Fentanyl)
15. A loss of the Erb's point potential with preservation of more proximal SSEP
components suggests a problem:
A) At the level of the spinal cord
COMPLETE QUESTIONS AND VERIFIED
DETAILED SOLUTIONS || 100%
GUARANTEED PASS <LATEST VERSION>
Domain 1: Instrumentation and Setup
1. What is the primary purpose of electrode impedance testing?
A) To measure the amplitude of the signal
B) To ensure good electrical contact between the electrode and the skin
C) To determine the stimulation intensity
D) To filter out 60 Hz noise
B) To ensure good electrical contact between the electrode and the skin
2. A 60 Hz "hum" is most likely caused by:
A) ECG artifact
B) Poor electrode impedance
C) Power line interference
D) EMG activity from patient movement
C) Power line interference
3. The bandpass filter setting that would be most appropriate for recording
Somatosensory Evoked Potentials (SSEPs) is:
A) 1-30 Hz
B) 10-100 Hz
C) 30-300 Hz
D) 100-3000 Hz
C) 30-300 Hz
4. Which type of electrode is typically used for recording transcranial motor evoked
potentials (TcMEPs)?
A) Subdermal needle electrodes
B) Cup electrodes
C) Corkscrew electrodes
, D) Disc electrodes
A) Subdermal needle electrodes
5. The "Notch" filter is used to eliminate:
A) High-frequency electrocautery artifact
B) Low-frequency drift
C) Power line frequency (e.g., 50/60 Hz)
D) Muscle artifact
C) Power line frequency (e.g., 50/60 Hz)
6. For upper extremity SSEPs, the Erb's point electrode primarily records:
A) N13 subcortical potential
B) P9 far-field potential
C) The compound nerve action potential (CNAP)
D) N20 cortical potential
C) The compound nerve action potential (CNAP)
7. What is the standard international system for EEG electrode placement?
A) 10-20 System
B) 10-10 System
C) Mayo System
D) International Bipolar System
A) 10-20 System
8. A stimulus duration of 0.2 ms is typically used for:
A) Brainstem Auditory Evoked Potentials (BAEPs)
B) Somatosensory Evoked Potentials (SSEPs)
C) Transcranial Motor Evoked Potentials (TcMEPs)
D) Visual Evoked Potentials (VEPs)
B) Somatosensory Evoked Potentials (SSEPs)
9. Which montage is most commonly used for recording BAEPs?
A) Ipsilateral Ear to Contralateral Ear
B) Cz to Ai (ipsilateral ear)
C) Cz to Cc (contralateral cortex)
D) Fz to Ai (ipsilateral ear)
B) Cz to Ai (ipsilateral ear)
10. The ground electrode for IONM should be placed:
A) Between the stimulating and recording electrodes
, B) On the forehead
C) On the shoulder ipsilateral to stimulation
D) On the contralateral limb
A) Between the stimulating and recording electrodes
Domain 2: Somatosensory Evoked Potentials (SSEPs)
11. The N20 cortical peak recorded over the scalp following median nerve stimulation is
generated primarily in:
A) Thalamus
B) Primary motor cortex
C) Primary somatosensory cortex
D) Brachial plexus
C) Primary somatosensory cortex
12. A significant and persistent decrease in SSEP amplitude (>50%) is most indicative of:
A) Peripheral nerve ischemia
B) Anesthetic effects
C) Compromise of the dorsal columns
D) Hypothermia
C) Compromise of the dorsal columns
13. The P37 potential, elicited by posterior tibial nerve stimulation, is best recorded over
which scalp location?
A) C3' (contralateral)
B) C4' (contralateral)
C) Cz'
D) Fpz
C) Cz'
14. Which anesthetic agent has the LEAST suppressive effect on cortical SSEPs?
A) Propofol
B) Volatile inhalants (e.g., Isoflurane)
C) Nitrous Oxide
D) Opioids (e.g., Fentanyl)
D) Opioids (e.g., Fentanyl)
15. A loss of the Erb's point potential with preservation of more proximal SSEP
components suggests a problem:
A) At the level of the spinal cord
