Which condition results from rupture or obstruction of a brain vessel and causes sudden loss of consciousness and function?

• A. Stroke
• B. Heart attack
• C. Epilepsy
• D. Migraine

Answer: (A)

A cerebrovascular event occurs when a brain vessel ruptures or becomes obstructed, cutting off blood flow to part of the brain. When blood flow is interrupted, brain cells die quickly, leading to sudden loss of consciousness and neurological deficits such as weakness, trouble speaking, or vision changes. This is a stroke, which can be ischemic (a clot blocking a vessel) or hemorrhagic (a vessel rupture with bleeding). The description in the question matches stroke because the underlying issue is a rupture or blockage of a brain vessel causing abrupt loss of brain function. Heart attack involves the heart, epilepsy is a problem with brain electrical activity, and migraines are typically headaches and related symptoms rather than a sudden loss of consciousness from a brain vessel event.