A stroke occurs when the blood supply to part of the brain is interrupted or reduced, preventing brain tissue from getting oxygen and nutrients. This can lead to brain cells dying within minutes. Strokes can be classified into two main types: ischemic stroke and hemorrhagic stroke.
Traumatic brain injury (TBI) is caused by a blow or jolt to the head or a penetrating head injury that disrupts the normal function of the brain. The severity of a TBI can range from mild (a brief change in mental status or consciousness) to severe (an extended period of unconsciousness or memory loss).
