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What are some causes of strokes in humans?

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Strokes in humans occur when blood supply flowing to the brain is reduced or interrupted, which causes the brain cells to die because the brain is not receiving nutrients and oxygen, according to Mayo Clinic. A stroke may also be caused by a blocked artery or the bursting of a blood vessel that causes a disruption in blood flow to the brain.

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The most common type of stroke that occurs is an ischemic stroke caused by brain arteries that are blocked or narrow, ultimately reducing blood flow, explains Mayo Clinic. A thrombotic stroke, a type of ischemic stroke, is caused by a blood clot that is formed in an artery that supplies blood to the brain. An embolic stroke, a type of ischemic stroke, is caused by a blood clot or debris in the heart that blocks or narrows the bloodstream to the brain arteries.

People who are experiencing a stroke often experience confusion and difficulty speaking and understanding others, according to Mayo Clinic. Patients may also develop weakness, numbness or paralysis in the leg, arm, face or one side of the body. One side of the mouth may also droop. Strokes can also cause people to have blackened or blurred vision, severe headaches that may produce dizziness, vomiting or loss of consciousness, and trouble with walking due to a lack of coordination and balance.

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