Objective: the primary objective is to investigate the natural course of active-and passive range of motion and principally the difference score between active-and passive cervical range of motion after a whiplash trauma. The secondary objectives are: investigate the predictive value of active-and passive range of motion and chronicity. Further, the correlation between the degree of restriction of the active and passive backward flexion and chronicity will be investigated. Finally, the correlation between the possible predictive factors such as pain, ideas and feeling about pain, memory and attention, events of the last year and complaints after the motor vehicle accident and chronicity are examined.