Rear-end impacts caused worse initial symptoms and specific clinical findings, not clearly distinguished from those occurring after frontal impacts. WAD III injuries, retro-orbital pain, and isolated contra-directional pro-/retraction pain occurred more frequently after rear-end impacts, indicating the importance of shear loads and craniocervical junction vulnerability. Head inward rotation during rearend impacts caused a more restricted mobility in the same direction at the primary examination than did outward rotation, indicating a possible influence from the shoulder part of the seat belt. The oneyear outcome was mainly influenced by individual factors and less by the impact characteristics.
Keywords:
whiplash; rear-end impacts; frontal impacts; accident investigation; clinical findings