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Quiz

Which of the following is NOT true concerning stroke?

Hemorrhagic stroke is more common than ischemic stroke.
 An embolic stroke occurs when a detached clot flows into and blocks a cerebral artery.
 Global anoxia presents an ischemic challenge to the brain and is classified as a hypoperfusion infarction.
 The most common cause of non-traumatic intracerebral hematoma is hypertensive hemorrhage.

In which of the following locations is hypertensive hemorrhage LEAST LIKELY to occur?
Thalamus
 Cerebellum
 Basal Ganglia
 Pons
 Occipital Lobe

Which of the following is NOT true concerning CT of a stroke patient?
Patients who have a hypertensive hemorrhage may have extension of blood into the ventricular system.
 On imaging, a coagulopathy related intracerebral hemorrhage often has a heterogenous appearance.
 The underlying arteriovenous malformation causing stroke is almost always visible on CT scan.
 On CT, prominent vessels adjacent to a hematoma suggest an underlying arteriovenous malformation.

In which of the following locations is an aneurysm LEAST LIKELY to occur?
Anterior communicating artery
 Middle cerebral artery bifurcation
 The tip of the basilar artery
 Posterior communicating artery
 The opthalmic artery distal to its branch from the internal carotid

Which of the following is NOT true concerning CT findings of stroke?

As edema progresses, brain density decreases proportionately.
 Lentiform nucleus obscuration indicates proximal posterior cerebral artery occlusion.
 A dense basilar or middle cerebral artery corresponds to thrombus in the affected vessel.
 The insular ribbon sign is the loss of the gray-white interface in the lateral insula due to ischemia.
 Diffuse hypodensity and sulcal effacement is the most consistent sign of infarction.

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