Motorcyclist's fracture:
A. i.e. Ring fracture: Motorcyclist's fracture is a ring fracture of skull baseQ, separating the rim of foramen magnum from rest of the base. It usually results due to sudden anteroflexion of cervical spine without impact on occiput caused usually by veical deceleration injury (fall from height) or rarely motorcycle accident. Motorcyclist can sustain ring fracture and pillion rider (i.e. atlantooccipital avulsion with dural tear).
Ring fracture
Comminuted fracture
Separation of suture between anterior and posterior half of skull.
Fracture base of skull