Whiplash
Whiplash is condition caused by injury to the soft-tissue structures of the cervical spine, or neck region. Usually whiplash is a strain of the muscles or sprain of the ligaments that move and support the spine and head. Often whiplash occurs after a sudden, unexpected movement of extension and flexion of the neck, most commonly during a car crash. This can also be the result of sleeping or holding the neck in an awkward position.