<prompt> ;Whip-lash injury is caused due to -A fall from a heightAcute hyperextension of the spineA blow on top to headAcute hyperflexion of the spine  <response>: Whiplash injury : acceleration injury , cervical sprain syndrome , soft tissue neck injury it is an unconventional inconsequential ligamentous injury of the cervical spine allegedly due to an extension injury following a rear end collision in an A clinical features : symptoms - upper neck pain become worse with movement - occipital headache - neck stiffness - rarely veigo ,auditory or visual disturbance : sign - decreased range of movements - neck muscles spasm investigation - x- ray usually normal .MRI helps to make diagnosis treatment - conservative REF : MAHESWARI 9TH ED 