A stroke occurs when blood flow to a part of the brain is disrupted, either by a blockage (ischemic stroke) or bleeding (hemorrhagic stroke). This deprives brain cells of oxygen and nutrients, causing them to die. As a result, the functions controlled by that part of the brain are affected, such as movement, speech, and cognition. The symptoms of a stroke can vary depending on the area of the brain affected but may include weakness or numbness on one side of the body, difficulty speaking, vision problems, and loss of balance or coordination.
