Whiplash is a non-medical term describing a range of injuries to the neck caused by or related to a sudden distortion of the neck associated with extension, although the exact injury mechanism(s) remain unknown. The term “whiplash” is a colloquialism. “Cervical acceleration-deceleration” (CAD) describes the mechanism of the injury, while the term “whiplash associated disorders” (WAD) describes the injury sequelae and symptoms. Whiplash is commonly associated with motor vehicle accidents, usually when the vehicle has been hit in the rear; however, the injury can be sustained in many other ways, including headbanging, bungee jumping and falls. It is one of the main injuries covered by insurance. In the United Kingdom, 430,000 people made an insurance claim for whiplash in 2007, accounting for 14% of every driver’s premium. Before the invention of the car, whiplash injuries were called “railroad spine” as they were noted mostly in connection with train collisions. The first case of severe neck pain arising from a train collision was documented around 1919. The number of whiplash injuries has since risen sharply due to rear-end motor vehicle collisions. Given the wide variety of symptoms associated with whiplash injuries, the Quebec Task Force on Whiplash-Associated Disorders coined the phrase ‘Whiplash-Associated Disorders’.