Stroke

A stroke occurs when a part of brain suddenly not receiving the blood supply or a sudden bleeding in the brain by blood vessel bursts.

A stroke or brain attack develops when a blood clot blocks an artery that supplies oxygen rich blood to the brain or a blood vessel breaks, interrupting blood flow to an area of the brain. Thus brain cells do not receive oxygen and nutrient rich blood and begins to die and causes brain damage.

Stroke classification

Stroke or brain attack is classified into two types they are Ischemic stroke and Hemorrhagic stroke based upon the way it has happen.

Ischemic Stroke

When an artery supplying the brain with blood becomes blocked, suddenly decreasing or stopping blood flow and ultimately causing a brain infarction. Blood clots are the most common cause of artery blockage and brain infarction.

Hemorrhagic Stroke

In a healthy individual, neurons do not come into direct contact with blood. Neurons receive nutrients and oxygen via thin walls of cerebral capillaries. When arteries in the brain breaks open and spills blood, can affect chemical balance that is a must for the neurons to function normally called as hemorrhagic stroke.

Transient Ischemic Attacks

Otherwise called as mini-stroke, it starts just like a stroke but resolves leaving no noticeable symptoms or deficits.

When brain cells die during a stroke, functions controlled by that area of the brain are affected. These functions include speech, movement and memory.

One who has a minor stroke may have only minor problems of arm or leg weakness.  People who have major strokes may be paralyzed on one side or lose their ability to speak.

Next Stroke Risk Factors