A clot in the blood vessel carrying blood to the brain causes stroke. Another name for this is an embolism. It can be caused by a thrombus or another particle. As a result, part of the brain doesn't get enough oxygen. Nerve cells are unable to work, and die. This causes the part of the body controlled by that side of the brain to not function properly. It causes permanent damage because those brain cells can't be replaced. This is the reason why many are paralyzed for life.

Stroke can occur without any warning. However, a headache may arise, especially in the case of both kinds of hemorrhages. Symptoms are also based on which part of the brain is affected by the blood clot. In every person, symptoms vary because the brain differs between every person. Other symptoms that may occur before a stroke are numbness, loss of sight in one or both eyes, and dizziness.

, a variety of outcomes can occur. It all depends on how quickly the person is taken care of and how quickly the clot is removed. Some results can be minor such as only paralysis of only one part of one's body. However, it could be a lot more serious such as paralysis of one whole side of the body, and even death. Therefore, the quicker someone receives emergency help, the lesser permanent damage he will acquire. But, patients will be able to recover partially as other parts of the brain take over the damaged parts.

No one knows the real cause of migraines, but there have been many statements suggesting possible causes. There are four possibilities: a change in blood flow, nerve problems, changes in serotonin level, and muscle tension. The change in blood can be caused when the blood vessels narrow, called vasoconstriction. Changes in nerves and chemicals affect pain perception. Sometimes, pain signals can travel into the pain receptors in the brain. Differences in the serotonin levels can also cause vasoconstriction. Muscle tension is a possible cause, but it isn't one that occurs to often. It is often related to periods of stress, fever, hormonal changes in the women menstrual cycle.

Many people are at risk o

Some common words found in the essay are:
Background Migraines, Risk Factors, Symptoms Stroke, Background Stroke, risk factors, permanent damage, risk stroke, leading cause, blood flow, symptoms occur, occur warning, person symptoms, muscle tension, change blood,
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Approximate Pages = 3 (250 words per page double spaced)