TBI is caused by an external force applied to the head, resulting in an injury to the brain. In people over 65, TBIs are most commonly caused by a fall. In younger people, they are most commonly caused by motor vehicle accidents, sports injuries, and interpersonal violence.[1]
What causes traumatic brain injury?
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•Last Updated: May 16, 2025
Traumatic brain injury (TBI) is caused by an external force that impacts the head, which leads to brain injury. In people over age 65, falls are the most common cause, whereas younger people often experience TBIs from motor vehicle accidents, sports injuries, and interpersonal violence.