What is the primary cause of a stroke?

The primary cause of a stroke is the reduction or lack of blood supply to part of the brain. This interruption of blood flow means that brain cells are deprived of oxygen and nutrients, which are crucial for their survival. When this occurs, it can lead to the damage or death of brain cells, resulting in a loss of neurological function corresponding to the affected area of the brain.

Strokes can be categorized into two main types: ischemic strokes, which account for the majority of cases and are caused by a blockage in an artery supplying blood to the brain; and hemorrhagic strokes, which involve bleeding into or around the brain. Both types involve some form of compromised blood flow to the brain, emphasizing the importance of adequate blood supply for brain health and function.

Understanding this mechanism is vital for recognizing stroke symptoms, prompt diagnosis, and implementing timely treatments to minimize lasting damage and improve outcomes for individuals experiencing a stroke.