One of the following structure is intact in closed head injury?
Closed head injury (non-penetrating): Damage to the brain without any fracture of the skull and/or penetration of dura; most often results from blunt trauma. Ref - Krishan Vij textbook of forensic medicine and toxicology 5e pg : 281,284
Scalp
Skull
Dura mater
Arachnoid mater
Mechanical injuries