Ischemic stroke is caused by which mechanism?

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Multiple Choice

Ischemic stroke is caused by which mechanism?

Explanation:
Ischemic stroke happens when a blood vessel in the brain is blocked, cutting off blood flow and depriving brain tissue of oxygen and glucose. A clot can form directly in a brain artery or travel from elsewhere and lodge in a vessel, stopping perfusion to a region. Without this blood supply, brain cells quickly lose energy and begin to die, causing the sudden neurological deficits typical of an ischemic event. This mechanism is distinct from a hemorrhagic stroke, where bleeding into the brain from a ruptured vessel causes damage. The other options describe infection or age-related degeneration, which are not about blocked blood flow to brain tissue.

Ischemic stroke happens when a blood vessel in the brain is blocked, cutting off blood flow and depriving brain tissue of oxygen and glucose. A clot can form directly in a brain artery or travel from elsewhere and lodge in a vessel, stopping perfusion to a region. Without this blood supply, brain cells quickly lose energy and begin to die, causing the sudden neurological deficits typical of an ischemic event. This mechanism is distinct from a hemorrhagic stroke, where bleeding into the brain from a ruptured vessel causes damage. The other options describe infection or age-related degeneration, which are not about blocked blood flow to brain tissue.

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