"Motor cyclist" fracture among the following
Hinge' fracture (Motorcyclist fracture) occurs when the linear fracture passes across the middle cranial fossa, separating the skull base into 2 halves, and may be caused by a heavy blow to the side of the head (e.g. in motorcycle accidents). Ref - Krishnan Vij 5th edition pg 300
Hinge fracture of base of skull
Ring fracture of base of skull
Depressed fracture of skull
Comminuted fracture of skull
Mechanical injuries