Free CNIM Neurosurgery Questions and Answers

Question 1

What is the primary purpose of intraoperative neurophysiological monitoring (IONM) during neurosurgery?

Accepted Answer

To monitor neural pathways and prevent damage to the nervous system

Answer

To measure the patient's blood pressure

Answer

To manage the patient's pain levels

Answer

To ensure the sterility of the surgical field

Question 2

Which modality of IONM is commonly used to assess the integrity of motor pathways?

Accepted Answer

Transcranial motor evoked potentials (TcMEPs)

Answer

Electromyography (EMG)

Answer

Somatosensory evoked potentials (SSEPs)

Answer

Electroencephalography (EEG)

Question 3

What does a significant drop in somatosensory evoked potentials (SSEPs) during surgery typically indicate?

Accepted Answer

Potential neural pathway compromise

Answer

Improved neural function

Answer

Increased muscle activity

Answer

Hemodynamic stability

Question 4

Which of the following is a contraindication for using transcranial electrical stimulation in TcMEP monitoring?

Accepted Answer

All of the above

Answer

Presence of spinal implants

Answer

Recent stroke history

Answer

Patients with cardiac pacemakers

Question 5

What type of anesthesia is preferred for optimal IONM results?

Accepted Answer

Total intravenous anesthesia (TIVA)

Answer

Inhalational anesthesia

Answer

Local anesthesia

Answer

Regional anesthesia

Question 6

During a spine surgery, what is the purpose of monitoring free-running EMG?

Accepted Answer

To detect muscle activity that might indicate nerve root irritation or injury

Answer

To assess cortical brain function

Answer

To measure the depth of anesthesia

Answer

To evaluate the patient's pain response

Question 7

Which neural structures are typically monitored using brainstem auditory evoked potentials (BAEPs)?

Accepted Answer

Brainstem and auditory pathways

Answer

Visual pathways

Answer

Spinal cord

Answer

Peripheral nerves

Question 8

What is the primary goal of continuous EEG monitoring during neurosurgery?

Accepted Answer

To monitor cerebral cortical activity and detect ischemia

Answer

To ensure the patient is adequately sedated

Answer

To evaluate motor function

Answer

To assess brainstem reflexes

Question 9

Which factor can most significantly affect the quality of IONM signals?

Accepted Answer

Type of anesthesia used

Answer

Surgeon’s experience

Answer

Patient's age

Answer

Surgical duration

Question 10

What action should be taken if there is a sudden loss of TcMEPs during surgery?

Accepted Answer

Immediately notify the surgical team

Answer

Increase the patient's anesthetic dose

Answer

Wait for 10 minutes and recheck the signals

Answer

Turn off the monitoring equipment