1. Which technique is most commonly used to assess the integrity
of the auditory pathways during surgery near the temporal bone?
A. Somatosensory evoked potentials (SSEP)
B. Brainstem auditory evoked potentials (BAEP)
C. Motor evoked potentials (MEP)
D. Transcranial Doppler ultrasound
Answer: B) Brainstem auditory evoked potentials (BAEP)
Rationale: BAEPs are most commonly used to assess auditory
pathway integrity, particularly during surgeries near the temporal
bone or auditory pathways.
2. Which of the following is a common application of transcranial
Doppler (TCD) monitoring during surgery?
A. Monitoring cerebral blood flow
B. Assessing brain electrical activity
C. Detecting brain tumors
D. Monitoring muscle activity
Answer: A) Monitoring cerebral blood flow
Rationale: TCD is used to monitor cerebral blood flow, helping
detect any reductions in perfusion during surgery, which is vital
for preventing ischemic injury.
,3. Which type of monitoring is especially valuable during aortic
aneurysm repair to assess the spinal cord?
A. Brainstem auditory evoked potentials (BAEP)
B. Motor evoked potentials (MEPs)
C. Somatosensory evoked potentials (SSEP)
D. Transcranial Doppler ultrasound
Answer: C) Somatosensory evoked potentials (SSEP)
Rationale: SSEPs are crucial for monitoring spinal cord integrity
during aortic aneurysm repair, as the procedure can potentially
affect spinal cord blood supply.
4. What is the primary risk when using motor evoked potentials
(MEPs) for intraoperative monitoring in the setting of a
decompressive laminectomy?
A. Neurological deficits from ischemia
B. Seizure induction from electrical stimulation
C. Increased muscle relaxation from anesthesia
D. Sudden drop in blood pressure
Answer: B) Seizure induction from electrical stimulation
Rationale: MEPs involve transcranial electrical stimulation, which
may cause seizures in patients predisposed to seizure activity,
such as those with epilepsy or brain abnormalities.
, 5. 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.
6. What is the best response when there is a significant decrease
in somatosensory evoked potentials (SSEP) during spinal surgery?
A. Continue surgery without changes
B. Increase anesthesia depth
C. Stop surgery and assess the cause of the decline
D. Increase muscle relaxation
Answer: C) Stop surgery and assess the cause of the decline
Rationale: A significant decrease in SSEP indicates potential
injury or ischemia, and immediate action must be taken to prevent
further damage.
of the auditory pathways during surgery near the temporal bone?
A. Somatosensory evoked potentials (SSEP)
B. Brainstem auditory evoked potentials (BAEP)
C. Motor evoked potentials (MEP)
D. Transcranial Doppler ultrasound
Answer: B) Brainstem auditory evoked potentials (BAEP)
Rationale: BAEPs are most commonly used to assess auditory
pathway integrity, particularly during surgeries near the temporal
bone or auditory pathways.
2. Which of the following is a common application of transcranial
Doppler (TCD) monitoring during surgery?
A. Monitoring cerebral blood flow
B. Assessing brain electrical activity
C. Detecting brain tumors
D. Monitoring muscle activity
Answer: A) Monitoring cerebral blood flow
Rationale: TCD is used to monitor cerebral blood flow, helping
detect any reductions in perfusion during surgery, which is vital
for preventing ischemic injury.
,3. Which type of monitoring is especially valuable during aortic
aneurysm repair to assess the spinal cord?
A. Brainstem auditory evoked potentials (BAEP)
B. Motor evoked potentials (MEPs)
C. Somatosensory evoked potentials (SSEP)
D. Transcranial Doppler ultrasound
Answer: C) Somatosensory evoked potentials (SSEP)
Rationale: SSEPs are crucial for monitoring spinal cord integrity
during aortic aneurysm repair, as the procedure can potentially
affect spinal cord blood supply.
4. What is the primary risk when using motor evoked potentials
(MEPs) for intraoperative monitoring in the setting of a
decompressive laminectomy?
A. Neurological deficits from ischemia
B. Seizure induction from electrical stimulation
C. Increased muscle relaxation from anesthesia
D. Sudden drop in blood pressure
Answer: B) Seizure induction from electrical stimulation
Rationale: MEPs involve transcranial electrical stimulation, which
may cause seizures in patients predisposed to seizure activity,
such as those with epilepsy or brain abnormalities.
, 5. 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.
6. What is the best response when there is a significant decrease
in somatosensory evoked potentials (SSEP) during spinal surgery?
A. Continue surgery without changes
B. Increase anesthesia depth
C. Stop surgery and assess the cause of the decline
D. Increase muscle relaxation
Answer: C) Stop surgery and assess the cause of the decline
Rationale: A significant decrease in SSEP indicates potential
injury or ischemia, and immediate action must be taken to prevent
further damage.
