Lacunar infarctions:
A. Are due to hemorrhage.
B. Typically result in severe residual disability.
C. Produce small avascular cavities in the brain.
D. Are a form of TIAs.
E. Occur most often in the anterior cerebral artery
ANS: C
Rationale: Obstructions of blood flow in small, deep arteries result in lacunar infarctions. Lacunae are small cavities that remain after the necrotic tissue is cleared away. These infarctions occur most often in the basal ganglia, internal capsule, thalamus, and brainstem. Signs of lacunar infarctions develop slowly and are often either purely motor or purely sensory, with good recovery being common.
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