A stroke occurs when blood circulation to the
brain fails ，Sometimes called a "brain attack,".
This cuts off oxygen and can kill brain cells, affecting neurological
functions such as speech, vision, coordination, and thought.
Strokes fall into two broad categories: those
caused by blood-flow blockage and those caused by bleeding. An
ischemic stroke, which occurs when a blood vessel in the brain or neck
is blocked, is the most common stroke, responsible for about 80
percent of cases. Such blockages may form within a blood vessel of the
brain or neck (thrombosis), may migrate to the brain or neck as a clot
from another part of the body (embolism), or may result from severe
narrowing of an artery in or leading to the brain (stenosis). Stroke
is an equal threat to men and women. It occurs in all age groups and
races, though African-Americans suffer more severe strokes and have a
death rate nearly double that of whites.
Though most strokes occur in adults over 40,
children also have strokes, though these are typically caused by
underlying conditions such as congenital heart disease or sickle cell
anemia.Sometimes young adults between 20 and 40 fall victim.
The key to this kind of recovery, is to stay
focused on getting better and to not lose faith when rehabilitation
reaches a plateau. Support from family and friends also is crucial.
Improvement is almost glacial at times, But it adds up a step here and
a second there and eventually you can walk across the room or down to
the corner.
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