Your brain controls all the functions of your body including movement, thinking, talking, breathing and the beating of your heart. It receives a constanct supply of blood that is filled with the oxygen and nutrients needed to keep your brain healthy.
This blood is supplied by blood vessels called the carotid and vertebral arteries. These vessels are located in your neck and brain.
A stroke is the rapid loss of brain function caused by some type of disturbance in the blood supply to the brain. As a result, the part of the brain that does not receive blood starts to die.