The earliest manifestation of increase intracranial pressure following head injury is
Early signs of elevated ICP includes drowsiness and a diminished level of consciousness Coma and unilateral papillary changes are late signs and require immediate intervention Ref : Harrison's 19th edition Pgno :1779
Hemiparesis
Altered mental status
Ipsilateral pupillary dilatation
Contralateral pupillary dilatation
Trauma