TheoryCT ARRT Practice Questions
Free CT ARRT practice questions with answers and plain-English explanations. Browse the PDF, video and online mock test.
CT ARRT Questions
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Q1Which lobe of the brain is located in the most anterior portion of the cranium?
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✓ Correct 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.
Q2The primary visual cortex is located in which lobe of the cerebrum?
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✓ Correct 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.
Q3The third ventricle communicates with the lateral ventricles through which structure?
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✓ Correct 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.
Q4Which structure connects the third ventricle to the fourth ventricle?
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✓ Correct 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.
Q5On axial CT the lentiform nucleus is separated from the caudate nucleus by which structure?
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✓ Correct 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.
Q6The cerebellum is separated from the occipital lobes by which structure?
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✓ Correct 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).
Q7From superior to inferior, what is the correct order of brainstem components?
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✓ Correct 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).
Q8The crus cerebri (cerebral peduncles) is a landmark of which brainstem level on axial CT?
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✓ Correct 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.
Q9The trigeminal nerve (CN V) exits the posterior cranial fossa via which opening?
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✓ Correct 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.
Q10Which cranial nerves travel through the internal acoustic meatus (IAM)?
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✓ Correct 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.
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