Stroke is not a brain defect. Ischemic stroke is caused by a blood clot that could come from as far south as your legs. Hemorrhagic stroke is caused by a burs

Stroke is not a brain defect. Ischemic stroke is caused by a blood clot that could come from as far south as your legs. Hemorrhagic stroke is caused by a burst blood vessel that blocks blood getting to your brain. In both cases, stroke is the lack of oxygen to your brain. It is largely caused by cardiovascular disease.