CNIM Practice Exam Questions with
Verified Answers & Rationales
ABOUT THIS RESOURCE
The Certified Neurophysiologic Intraoperative Monitoring
(CNIM) examination, administered by ABRET, consists of
approximately 200 questions covering 8 major content domains. This
practice exam reflects the latest 2026/2027 exam content and
includes detailed rationales for every answer.
CNIM Exam Content Outline:
• Anatomy & Physiology – Nervous system, spinal cord, brain,
peripheral nerves
• Instrumentation & Electronics – Amplifiers, filters, electrodes, safety
• Somatosensory Evoked Potentials (SSEPs)
• Brainstem Auditory Evoked Potentials (BAEPs)
• Motor Evoked Potentials (MEPs)
• Electromyography (EMG) & Nerve Conduction Studies
• Electroencephalography (EEG) & Cortical Mapping
• Clinical Applications, Safety, & Professional Standards
SECTION 1: ANATOMY & PHYSIOLOGY (Questions 1–
35)
,Question 1: The primary motor cortex (precentral gyrus) is located in which
lobe of the brain?
A) Frontal lobe
B) Parietal lobe
C) Temporal lobe
D) Occipital lobe
Correct Answer: A) Frontal lobe
Rationale: The primary motor cortex (Brodmann area 4) is located in the
precentral gyrus of the frontal lobe. It is responsible for voluntary motor
control. The parietal lobe contains the somatosensory cortex. The temporal
lobe contains auditory cortex. The occipital lobe contains visual cortex.
Question 2: The optic radiations (geniculocalcarine tract) are located in
which lobe?
A) Frontal lobe
B) Parietal lobe
C) Temporal lobe
D) Occipital lobe
Correct Answer: C) Temporal lobe
Rationale: The optic radiations (geniculocalcarine tract) pass through the
temporal lobe. They carry visual information from the lateral geniculate
nucleus of the thalamus to the primary visual cortex in the occipital lobe.
Question 3: Which of the following nerves is NOT part of the brachial
plexus?
,A) Median nerve
B) Ulnar nerve
C) Radial nerve
D) Sciatic nerve
Correct Answer: D) Sciatic nerve
Rationale: The sciatic nerve is part of the lumbosacral plexus, not the brachial
plexus. The brachial plexus (C5-T1) gives rise to the median, ulnar, and radial
nerves of the upper extremity.
Question 4: The dorsal columns of the spinal cord are responsible for
transmitting:
A) Pain and temperature
B) Fine touch, vibration, and proprioception
C) Motor signals to the muscles
D) Reflex arcs
Correct Answer: B) Fine touch, vibration, and proprioception
Rationale: The dorsal columns (fasciculus gracilis and fasciculus cuneatus)
transmit fine touch, vibration, and proprioception. Pain and temperature are
transmitted via the spinothalamic tracts. Motor signals travel via the
corticospinal tracts.
Question 5: The lateral spinothalamic tract is responsible for transmitting:
A) Fine touch and vibration
B) Pain and temperature
C) Motor signals to the muscles
D) Proprioception
, Correct Answer: B) Pain and temperature
Rationale: The lateral spinothalamic tract carries pain and temperature
sensation. The anterior spinothalamic tract carries crude touch. The dorsal
columns carry fine touch, vibration, and proprioception.
Question 6: Which cranial nerve is responsible for facial motor function?
A) Cranial Nerve V (Trigeminal)
B) Cranial Nerve VII (Facial)
C) Cranial Nerve IX (Glossopharyngeal)
D) Cranial Nerve XII (Hypoglossal)
Correct Answer: B) Cranial Nerve VII (Facial)
Rationale: The facial nerve (CN VII) provides motor innervation to the
muscles of facial expression. CN V provides sensation to the face and motor
to the muscles of mastication. CN IX provides motor to the stylopharyngeus.
CN XII provides motor to the tongue.
Question 7: The corticospinal tract decussates (crosses) at which
anatomical location?
A) Pons
B) Medulla oblongata (pyramidal decussation)
C) Midbrain
D) Spinal cord
Correct Answer: B) Medulla oblongata (pyramidal decussation)
Rationale: The corticospinal tract decussates at the pyramidal decussation in
the medulla oblongata. Approximately 85-90% of fibers cross to the
Verified Answers & Rationales
ABOUT THIS RESOURCE
The Certified Neurophysiologic Intraoperative Monitoring
(CNIM) examination, administered by ABRET, consists of
approximately 200 questions covering 8 major content domains. This
practice exam reflects the latest 2026/2027 exam content and
includes detailed rationales for every answer.
CNIM Exam Content Outline:
• Anatomy & Physiology – Nervous system, spinal cord, brain,
peripheral nerves
• Instrumentation & Electronics – Amplifiers, filters, electrodes, safety
• Somatosensory Evoked Potentials (SSEPs)
• Brainstem Auditory Evoked Potentials (BAEPs)
• Motor Evoked Potentials (MEPs)
• Electromyography (EMG) & Nerve Conduction Studies
• Electroencephalography (EEG) & Cortical Mapping
• Clinical Applications, Safety, & Professional Standards
SECTION 1: ANATOMY & PHYSIOLOGY (Questions 1–
35)
,Question 1: The primary motor cortex (precentral gyrus) is located in which
lobe of the brain?
A) Frontal lobe
B) Parietal lobe
C) Temporal lobe
D) Occipital lobe
Correct Answer: A) Frontal lobe
Rationale: The primary motor cortex (Brodmann area 4) is located in the
precentral gyrus of the frontal lobe. It is responsible for voluntary motor
control. The parietal lobe contains the somatosensory cortex. The temporal
lobe contains auditory cortex. The occipital lobe contains visual cortex.
Question 2: The optic radiations (geniculocalcarine tract) are located in
which lobe?
A) Frontal lobe
B) Parietal lobe
C) Temporal lobe
D) Occipital lobe
Correct Answer: C) Temporal lobe
Rationale: The optic radiations (geniculocalcarine tract) pass through the
temporal lobe. They carry visual information from the lateral geniculate
nucleus of the thalamus to the primary visual cortex in the occipital lobe.
Question 3: Which of the following nerves is NOT part of the brachial
plexus?
,A) Median nerve
B) Ulnar nerve
C) Radial nerve
D) Sciatic nerve
Correct Answer: D) Sciatic nerve
Rationale: The sciatic nerve is part of the lumbosacral plexus, not the brachial
plexus. The brachial plexus (C5-T1) gives rise to the median, ulnar, and radial
nerves of the upper extremity.
Question 4: The dorsal columns of the spinal cord are responsible for
transmitting:
A) Pain and temperature
B) Fine touch, vibration, and proprioception
C) Motor signals to the muscles
D) Reflex arcs
Correct Answer: B) Fine touch, vibration, and proprioception
Rationale: The dorsal columns (fasciculus gracilis and fasciculus cuneatus)
transmit fine touch, vibration, and proprioception. Pain and temperature are
transmitted via the spinothalamic tracts. Motor signals travel via the
corticospinal tracts.
Question 5: The lateral spinothalamic tract is responsible for transmitting:
A) Fine touch and vibration
B) Pain and temperature
C) Motor signals to the muscles
D) Proprioception
, Correct Answer: B) Pain and temperature
Rationale: The lateral spinothalamic tract carries pain and temperature
sensation. The anterior spinothalamic tract carries crude touch. The dorsal
columns carry fine touch, vibration, and proprioception.
Question 6: Which cranial nerve is responsible for facial motor function?
A) Cranial Nerve V (Trigeminal)
B) Cranial Nerve VII (Facial)
C) Cranial Nerve IX (Glossopharyngeal)
D) Cranial Nerve XII (Hypoglossal)
Correct Answer: B) Cranial Nerve VII (Facial)
Rationale: The facial nerve (CN VII) provides motor innervation to the
muscles of facial expression. CN V provides sensation to the face and motor
to the muscles of mastication. CN IX provides motor to the stylopharyngeus.
CN XII provides motor to the tongue.
Question 7: The corticospinal tract decussates (crosses) at which
anatomical location?
A) Pons
B) Medulla oblongata (pyramidal decussation)
C) Midbrain
D) Spinal cord
Correct Answer: B) Medulla oblongata (pyramidal decussation)
Rationale: The corticospinal tract decussates at the pyramidal decussation in
the medulla oblongata. Approximately 85-90% of fibers cross to the
