CT ARRT Exam Questions & Answers 2026 (1–10)

Question 1

Which lobe of the brain is located in the most anterior portion of the cranium?

TheoryPractice · Accepted Answer

Frontal lobe. The frontal lobe occupies the anterior cranial fossa and is the most anteriorly positioned cerebral lobe, lying anterior to the central sulcus.

Question 2

The primary visual cortex is located in which lobe of the cerebrum?

TheoryPractice · Accepted Answer

Occipital lobe. The primary visual cortex (V1) resides in the occipital lobe, specifically along the calcarine sulcus, and processes visual input from the retinas.

Question 3

The third ventricle communicates with the lateral ventricles through which structure?

TheoryPractice · Accepted Answer

Foramen of Monro. The paired foramina of Monro (interventricular foramina) connect each lateral ventricle to the midline third ventricle, allowing CSF to flow between them.

Question 4

Which structure connects the third ventricle to the fourth ventricle?

TheoryPractice · Accepted Answer

Cerebral aqueduct of Sylvius. The cerebral aqueduct (aqueduct of Sylvius) is a narrow channel through the midbrain that connects the third and fourth ventricles.

Question 5

On axial CT the lentiform nucleus is separated from the caudate nucleus by which structure?

TheoryPractice · Accepted Answer

Internal capsule. The internal capsule is the white matter tract that separates the lentiform nucleus (putamen + globus pallidus) from the caudate nucleus and thalamus.

Question 6

The cerebellum is separated from the occipital lobes by which structure?

TheoryPractice · Accepted Answer

Tentorium cerebelli. The tentorium cerebelli is a dural fold that forms a tent-like partition separating the cerebellum (infratentorial) from the occipital lobes (supratentorial).

Question 7

From superior to inferior, what is the correct order of brainstem components?

TheoryPractice · Accepted Answer

Midbrain, pons, medulla oblongata. The brainstem consists of the midbrain (most superior), pons (middle), and medulla oblongata (most inferior, continuous with the spinal cord).

Question 8

The crus cerebri (cerebral peduncles) is a landmark of which brainstem level on axial CT?

TheoryPractice · Accepted Answer

Midbrain. The cerebral peduncles (crura cerebri) are large fiber bundles on the anterior midbrain and are the key identifying landmark of the midbrain level on axial CT.

Question 9

The trigeminal nerve (CN V) exits the posterior cranial fossa via which opening?

TheoryPractice · Accepted Answer

Meckel's cave / petrous apex. CN V exits through the porus trigeminus into Meckel's cave at the petrous apex before its branches exit via foramina rotundum, ovale, and spinosum; the main root traverses the petrous apex dural cave.

Question 10

Which cranial nerves travel through the internal acoustic meatus (IAM)?

TheoryPractice · Accepted Answer

CN VII and VIII. The facial nerve (CN VII) and vestibulocochlear nerve (CN VIII) both travel together through the internal acoustic meatus, making the IAM a critical landmark for these nerves.

CT ARRT Exam Questions & Answers 2026 (1–10)

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