An ischemic stroke occurs when a blood vessel supplying blood to the brain becomes blocked, often by a blood clot. This blockage prevents essential oxygen and nutrients from reaching brain cells, leading to their damage or death. Common causes include conditions like atherosclerosis, where fatty deposits build up in arteries, and atrial fibrillation, which can cause irregular heartbeats and clots. Symptoms of an ischemic stroke can include sudden weakness on one side of the body, difficulty speaking, or loss of balance. Recognizing these signs quickly is crucial, as timely treatment can minimize brain damage and improve recovery chances.