Back to Pegasus definition listing Choose a year from the dropdown to view that year's definition 2011 2011 2009 2007 Traumatic brain injury Date: May 2011 Definition: Death to brain tissue due to traumatic injury resulting in permanent neurological deficit with persisting clinical symptoms.No change since April 2007 Definition update history: Traumatic brain injury May 2011 Traumatic brain injury July 2009 Traumatic brain injury April 2007 What does this mean? Damage to brain tissue could be caused by an external trauma such as a severe head injury received in a road traffic accident. Share this by email Back to Pegasus definition listing