<prompt> One of the following structure is intact in closed head injury?ScalpSkullDura materArachnoid mater  <response>: Closed head injury non-penetrating: Damage to the brain without any fracture of the skull andor penetration of dura; most often results from blunt trauma. Ref - Krishan Vij textbook of forensic medicine and toxicology 5e pg : 281,284 