1. 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.
2. In intraoperative monitoring, what is the primary goal of
somatosensory evoked potentials (SSEPs)?
A) Assess motor function
B) Assess brain activity
C) Assess sensory pathway integrity
D) Measure nerve conduction velocity
Answer: C) Assess sensory pathway integrity
Rationale: SSEPs are used to assess the sensory pathways, particularly
the dorsal columns, to ensure that no damage occurs to sensory fibers
during surgery.
3. Which of the following is the most common stimulus for
evoking somatosensory evoked potentials?
A) Electrical stimulation of the skin
B) Visual stimulus
C) Auditory stimulus
D) Magnetic stimulation of the cortex
,Answer: A) Electrical stimulation of the skin
Rationale: SSEPs are typically evoked by electrical stimulation applied
to peripheral nerves, such as the median or tibial nerve.
4. Which monitoring technique is most commonly used to assess
motor pathway integrity during surgery?
A) Electroencephalography (EEG)
B) Motor evoked potentials (MEPs)
C) Visual evoked potentials (VEPs)
D) Brainstem auditory evoked potentials (BAEPs)
Answer: B) Motor evoked potentials (MEPs)
Rationale: MEPs are used to assess the motor pathways, particularly
the corticospinal tract, during surgeries that may affect motor function.
5. During spinal surgery, if there is a sudden loss of amplitude or
disappearance of somatosensory evoked potentials (SSEPs), this
suggests:
A) A potential ischemic event
B) A successful surgery
C) A decrease in motor function
D) Complete recovery of the sensory pathway
Answer: A) A potential ischemic event
Rationale: A significant decrease or loss of SSEP amplitude often
indicates ischemia or compression of the neural structures, requiring
immediate surgical intervention.
6. Which electrode placement is most commonly used for
monitoring tibial SSEPs?
, A) Midline of the scalp
B) Over the motor cortex
C) On the tibial nerve
D) On the cervical spine
Answer: C) On the tibial nerve
Rationale: Tibial SSEPs are typically evoked by stimulating the tibial
nerve and recording from electrodes placed on the scalp, with the tibial
nerve being the primary source of the sensory signal.
7. Which of the following is the most important consideration
when using motor evoked potentials (MEPs) for intraoperative
monitoring?
A) Proper placement of the ground electrode
B) Ensuring the anesthetic regimen is suitable
C) Use of somatosensory stimulus
D) Continuous measurement of blood pressure
Answer: B) Ensuring the anesthetic regimen is suitable
Rationale: Anesthesia can significantly affect MEPs, and care should
be taken to adjust anesthetic agents to preserve motor function during
monitoring.
8. During brain surgery, which technique is commonly used to
monitor the function of the brain cortex?
A) Brainstem auditory evoked potentials (BAEP)
B) Electrocorticography (ECoG)
C) Somatosensory evoked potentials (SSEP)
D) Visual evoked potentials (VEP)
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.
2. In intraoperative monitoring, what is the primary goal of
somatosensory evoked potentials (SSEPs)?
A) Assess motor function
B) Assess brain activity
C) Assess sensory pathway integrity
D) Measure nerve conduction velocity
Answer: C) Assess sensory pathway integrity
Rationale: SSEPs are used to assess the sensory pathways, particularly
the dorsal columns, to ensure that no damage occurs to sensory fibers
during surgery.
3. Which of the following is the most common stimulus for
evoking somatosensory evoked potentials?
A) Electrical stimulation of the skin
B) Visual stimulus
C) Auditory stimulus
D) Magnetic stimulation of the cortex
,Answer: A) Electrical stimulation of the skin
Rationale: SSEPs are typically evoked by electrical stimulation applied
to peripheral nerves, such as the median or tibial nerve.
4. Which monitoring technique is most commonly used to assess
motor pathway integrity during surgery?
A) Electroencephalography (EEG)
B) Motor evoked potentials (MEPs)
C) Visual evoked potentials (VEPs)
D) Brainstem auditory evoked potentials (BAEPs)
Answer: B) Motor evoked potentials (MEPs)
Rationale: MEPs are used to assess the motor pathways, particularly
the corticospinal tract, during surgeries that may affect motor function.
5. During spinal surgery, if there is a sudden loss of amplitude or
disappearance of somatosensory evoked potentials (SSEPs), this
suggests:
A) A potential ischemic event
B) A successful surgery
C) A decrease in motor function
D) Complete recovery of the sensory pathway
Answer: A) A potential ischemic event
Rationale: A significant decrease or loss of SSEP amplitude often
indicates ischemia or compression of the neural structures, requiring
immediate surgical intervention.
6. Which electrode placement is most commonly used for
monitoring tibial SSEPs?
, A) Midline of the scalp
B) Over the motor cortex
C) On the tibial nerve
D) On the cervical spine
Answer: C) On the tibial nerve
Rationale: Tibial SSEPs are typically evoked by stimulating the tibial
nerve and recording from electrodes placed on the scalp, with the tibial
nerve being the primary source of the sensory signal.
7. Which of the following is the most important consideration
when using motor evoked potentials (MEPs) for intraoperative
monitoring?
A) Proper placement of the ground electrode
B) Ensuring the anesthetic regimen is suitable
C) Use of somatosensory stimulus
D) Continuous measurement of blood pressure
Answer: B) Ensuring the anesthetic regimen is suitable
Rationale: Anesthesia can significantly affect MEPs, and care should
be taken to adjust anesthetic agents to preserve motor function during
monitoring.
8. During brain surgery, which technique is commonly used to
monitor the function of the brain cortex?
A) Brainstem auditory evoked potentials (BAEP)
B) Electrocorticography (ECoG)
C) Somatosensory evoked potentials (SSEP)
D) Visual evoked potentials (VEP)
