For Individuals/Families


An acquired brain injury (ABI) is damage to the brain caused by:

  • A traumatic injury, e.g., a car accident, fall, assault (including intimate partner violence) or sports-related injury, or
  • A medical problem or disease, e.g., the brain not getting enough oxygen, a tumour, brain aneurysm, infection or a stroke.

An ABI occurs after birth and is not related to:

  • A congenital disorder or developmental disability, e.g., cerebral palsy, muscular dystrophy, autism, spina bifida with hydrocephalus, or
  • A process that gradually damages the brain, e.g., dementia, multiple sclerosis, Alzheimer’s Disease, Parkinson’s Disease.

Source: Toronto ABI Network

What is a concussion?

A mild brain injury following trauma is sometimes called a concussion. The brain is injured by an impact or a sudden change in momentum or movement.

Some people experience a brief loss of consciousness (not exceeding 30 minutes). Or a person may remain conscious, but feel dazed, in a fog or confused.

A concussion can cause both short-term and long-term difficulties. It may or may not show up on a diagnostic imaging test, such as a CT scan.