A whiplash injury of cervical spine is typically caused by a special kind of accident. It usually involves a driver of an automobile who experiences a direct impact from behind. There are no external signs of the injury, but shearing forces from the rapid flexion and extension momement result in segmental lesions. The extent of injury to the tissue depends upon the force of impact, the exact position of head at the moment of impact, the awareness of impending injury in order to "prepare" the musculature, and the normalcy of all the tissues of the neck. Diagnosis demend a carefully detailed history and a through musculo-skeletal--neurological examination. Whenever possible, the symptoms claimed must be verified by a carefule neurological examination.