1. The use of motor evoked potentials (MEPs) is contraindicated
in:
A. Brain surgeries
B. Spinal surgeries
C. Patients with pacemakers
D. Vascular surgeries
Answer: C) Patients with pacemakers
Rationale: MEPs use electrical stimulation, which can interfere
with pacemakers, making their use contraindicated in such
patients.
2. When monitoring visual evoked potentials (VEP), which of the
following is a common stimulus used?
A. Flashing light or checkerboard pattern
B. Electrical stimulation of the median nerve
C. Sound stimulus through auditory channels
D. Electrical pulse to the tibial nerve
Answer: A) Flashing light or checkerboard pattern
Rationale: VEPs are typically evoked by visual stimuli such as a
flashing light or checkerboard pattern, which are used to assess
the visual pathways.
,3. 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.
4. When monitoring the somatosensory evoked potentials (SSEP)
in a lower limb, which of the following nerves is commonly
stimulated?
A. Tibial nerve
B. Median nerve
C. Femoral nerve
D. Ulnar nerve
Answer: A) Tibial nerve
Rationale: The tibial nerve is commonly stimulated in lower limb
surgeries to monitor SSEP responses from the sensory pathways.
, 5. What is the primary function of transcranial Doppler
ultrasound during intraoperative monitoring?
A. Assessing cerebral blood flow
B. Monitoring spinal cord function
C. Measuring brain electrical activity
D. Detecting cortical motor responses
Answer: A) Assessing cerebral blood flow
Rationale: Transcranial Doppler ultrasound is used to assess blood
flow in the brain and detect any reductions in cerebral perfusion.
6. 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.
in:
A. Brain surgeries
B. Spinal surgeries
C. Patients with pacemakers
D. Vascular surgeries
Answer: C) Patients with pacemakers
Rationale: MEPs use electrical stimulation, which can interfere
with pacemakers, making their use contraindicated in such
patients.
2. When monitoring visual evoked potentials (VEP), which of the
following is a common stimulus used?
A. Flashing light or checkerboard pattern
B. Electrical stimulation of the median nerve
C. Sound stimulus through auditory channels
D. Electrical pulse to the tibial nerve
Answer: A) Flashing light or checkerboard pattern
Rationale: VEPs are typically evoked by visual stimuli such as a
flashing light or checkerboard pattern, which are used to assess
the visual pathways.
,3. 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.
4. When monitoring the somatosensory evoked potentials (SSEP)
in a lower limb, which of the following nerves is commonly
stimulated?
A. Tibial nerve
B. Median nerve
C. Femoral nerve
D. Ulnar nerve
Answer: A) Tibial nerve
Rationale: The tibial nerve is commonly stimulated in lower limb
surgeries to monitor SSEP responses from the sensory pathways.
, 5. What is the primary function of transcranial Doppler
ultrasound during intraoperative monitoring?
A. Assessing cerebral blood flow
B. Monitoring spinal cord function
C. Measuring brain electrical activity
D. Detecting cortical motor responses
Answer: A) Assessing cerebral blood flow
Rationale: Transcranial Doppler ultrasound is used to assess blood
flow in the brain and detect any reductions in cerebral perfusion.
6. 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.
