1. During spinal surgery, if motor evoked potentials (MEPs) are
absent, it most likely indicates:
A. Adequate anesthesia
B. A possible motor pathway injury
C. A successful decompression
D. Normal sensory function
Answer: B) A possible motor pathway injury
Rationale: The absence of MEPs during surgery suggests
potential injury or compression of the motor pathways, indicating
the need for corrective action.
2. Which monitoring technique involves stimulating the visual
pathway to assess brain activity during surgery?
A. Visual evoked potentials (VEP)
B. Electroencephalography (EEG)
C. Brainstem auditory evoked potentials (BAEP)
D. Somatosensory evoked potentials (SSEP)
Answer: A) Visual evoked potentials (VEP)
Rationale: VEPs are used to monitor the integrity of the visual
pathways, including the optic nerve and occipital cortex.
,3. When intraoperative monitoring of the facial nerve is used,
what is the most common outcome measured?
A. Muscle contraction of the face
B. Cerebral blood flow
C. Sensory pathway integrity
D. Brainstem activity
Answer: A) Muscle contraction of the face
Rationale: The facial nerve is monitored by measuring the muscle
response (usually in the orbicularis oculi or zygomaticus) to
ensure the nerve remains intact during surgery.
4. Which of the following monitoring techniques is commonly
used for patients undergoing a carotid endarterectomy?
A. Brainstem auditory evoked potentials (BAEP)
B. Somatosensory evoked potentials (SSEP)
C. Electroencephalography (EEG)
D. Visual evoked potentials (VEP)
Answer: C) Electroencephalography (EEG)
Rationale: EEG is used to monitor brain function and detect
ischemic events during carotid endarterectomy, where blood flow
to the brain may be temporarily disrupted.
, 5. In the case of significant loss of signal in somatosensory evoked
potentials (SSEP) during surgery, the first response should be:
A. Increase the stimulus intensity
B. Check the patient’s anesthetic depth
C. Assess for possible ischemia or neural injury
D. Decrease the surgical retraction force
Answer: C) Assess for possible ischemia or neural injury
Rationale: A loss of signal often indicates potential ischemia or
neural injury, and immediate action should be taken to investigate
and address the cause.
6. Which of the following is commonly used to monitor brainstem
integrity during surgery?
A. Electroencephalography (EEG)
B. Somatosensory evoked potentials (SSEP)
C. Brainstem auditory evoked potentials (BAEP)
D. Motor evoked potentials (MEP)
Answer: C) Brainstem auditory evoked potentials (BAEP)
Rationale: BAEPs are used to monitor the integrity of the
auditory pathways, particularly the brainstem, during surgeries
that may affect brainstem function.
absent, it most likely indicates:
A. Adequate anesthesia
B. A possible motor pathway injury
C. A successful decompression
D. Normal sensory function
Answer: B) A possible motor pathway injury
Rationale: The absence of MEPs during surgery suggests
potential injury or compression of the motor pathways, indicating
the need for corrective action.
2. Which monitoring technique involves stimulating the visual
pathway to assess brain activity during surgery?
A. Visual evoked potentials (VEP)
B. Electroencephalography (EEG)
C. Brainstem auditory evoked potentials (BAEP)
D. Somatosensory evoked potentials (SSEP)
Answer: A) Visual evoked potentials (VEP)
Rationale: VEPs are used to monitor the integrity of the visual
pathways, including the optic nerve and occipital cortex.
,3. When intraoperative monitoring of the facial nerve is used,
what is the most common outcome measured?
A. Muscle contraction of the face
B. Cerebral blood flow
C. Sensory pathway integrity
D. Brainstem activity
Answer: A) Muscle contraction of the face
Rationale: The facial nerve is monitored by measuring the muscle
response (usually in the orbicularis oculi or zygomaticus) to
ensure the nerve remains intact during surgery.
4. Which of the following monitoring techniques is commonly
used for patients undergoing a carotid endarterectomy?
A. Brainstem auditory evoked potentials (BAEP)
B. Somatosensory evoked potentials (SSEP)
C. Electroencephalography (EEG)
D. Visual evoked potentials (VEP)
Answer: C) Electroencephalography (EEG)
Rationale: EEG is used to monitor brain function and detect
ischemic events during carotid endarterectomy, where blood flow
to the brain may be temporarily disrupted.
, 5. In the case of significant loss of signal in somatosensory evoked
potentials (SSEP) during surgery, the first response should be:
A. Increase the stimulus intensity
B. Check the patient’s anesthetic depth
C. Assess for possible ischemia or neural injury
D. Decrease the surgical retraction force
Answer: C) Assess for possible ischemia or neural injury
Rationale: A loss of signal often indicates potential ischemia or
neural injury, and immediate action should be taken to investigate
and address the cause.
6. Which of the following is commonly used to monitor brainstem
integrity during surgery?
A. Electroencephalography (EEG)
B. Somatosensory evoked potentials (SSEP)
C. Brainstem auditory evoked potentials (BAEP)
D. Motor evoked potentials (MEP)
Answer: C) Brainstem auditory evoked potentials (BAEP)
Rationale: BAEPs are used to monitor the integrity of the
auditory pathways, particularly the brainstem, during surgeries
that may affect brainstem function.
