A stroke can occur if too little blood is supplied to a part of the brain. Tissue dies and brain functions are lost.
Like all organs in the body, the brain needs oxygen and nutrients to function properly. These life-sustaining substances are carried to the brain via the circulatory system, as components of the blood.
Someone can make a stroke when there is too little blood supply to a part of the brain, with the result that tissue dies and brain functions are lost. A stroke can be caused by a ruptured blood vessel, for example in an aneurysm, or by an embolism; that is a clot or particle that gets stuck in one of the cerebral arteries and obstructs blood flow.
Depending on the location of the stroke in the brain, a stroke can cause speech disorders, paralysis, unconsciousness or even death.
