Virginia:

“Brain injury” is any injury to the brain that occurs after birth that is acquired through traumatic or non-traumatic insults.

Non-traumatic insults may include, but are not limited to anoxia, hypoxia, aneurysm, toxic exposure, encephalopathy, surgical interventions, tumor and stroke.

Brain injury does not include hereditary, congenital or degenerative brain disorders, or injuries induced by birth trauma.

CDC:

Defines a traumatic brain injury (TBI) as a disruption in the normal function of the brain that can be caused by a bump, blow, or jolt to the head, or penetrating head injury.