Saturday, 3 September 2011

Causes of Stroke and effect

A stroke result from a defect in the blood supply to the brain. The most sudden and severe form is a ruptured blood vessels in the brain causing cerebral haemoorrhage {bleading in the brain}. Blood vessels In the brain may become blocked by an embolism, that is, a small clot of blood that has become dislodge from other part of the body. The arteries of the brain may themselves developed thickened walls due to arthroscleros and gradually become  blocked.
            When brain cells are deprived from the glucose and oxygen normally supply by the blood vessels, they stop working. As a result, the part of the body normally control by the affected part of  brain cannot function and so become paralysed. Usually, this affect the face, arm, leg on one  siide of the body only: the side opposite to the damaged brain. If the speech centre is involved, the patient may loose power of speech, or the ability to form words distinctly.

            Stroke usually affect those people  who are over the age of 50. The damage brain cell do not recover, but this need not result in permanent paralysis if other brain cell take over. With help, e.g. physiotheraphy, the patient usually regains the use of the affected organs, although not to the full extent.