Traumatic brain injury is a type of acquired brain injury caused by external mechanisms.

• A. True, TBI is a type of ABI caused by external mechanisms.
• B. False, TBI is not a form of ABI.
• C. TBI is a genetic condition.
• D. TBI is always due to infection.

Answer: (A)

The main concept here is that an acquired brain injury (ABI) refers to brain damage that occurs after birth from events that aren’t congenital. Traumatic brain injury fits this category because it results from external mechanical forces acting on the head or penetrating the skull, such as blows to the head, vehicle crashes, falls, or sports injuries. Because it arises from an external event after birth, TBI is a type of ABI, which is why the statement is true.

Other ABIs include non-traumatic causes like stroke, infections, tumors, or lack of oxygen, which are not the result of an external mechanical impact. So the claim isn’t that TBI is genetic or always caused by infection; those alternatives describe different, non-traumatic brain injury mechanisms.