Focal_and_diffuse_brain_injury
Focal and diffuse brain injury
Medical condition
Focal and diffuse brain injury are ways to classify brain injury: focal injury occurs in a specific location, while diffuse injury occurs over a more widespread area. It is common for both focal and diffuse damage to occur as a result of the same event; many traumatic brain injuries have aspects of both focal and diffuse injury.[1] Focal injuries are commonly associated with an injury in which the head strikes or is struck by an object; diffuse injuries are more often found in acceleration/deceleration injuries, in which the head does not necessarily contact anything, but brain tissue is damaged because tissue types with varying densities accelerate at different rates.[2] In addition to physical trauma, other types of brain injury, such as stroke, can also produce focal and diffuse injuries.[1] There may be primary and secondary brain injury processes.