1. head injuries, closed Traumatic injuries to the cranium where the integrity of the skull is not compromised and no bone fragments or other objects penetrate the skull and duramater. This frequently results in mechanical injurybeing transmitted to intracranial structures which may produce traumatic brain injuries, hemorrhage, or cranial nerveinjury. (From Rowland, Merritt's Textbook of Neurology, 9th ed, p417)