Study helps define headaches o...( If you happen to be looking left or rig...),Health

If you happen to be looking left or right when your car is rear-ended, you could be lucky enough to avoid the headache of whiplash. A new study at the University of Alberta shows that whiplash injuries in low-speed accidents are much less likely if the victim's head happens to be turned to either side instead of facing front when the vehicle is struck.

The research involving neck muscles is giving a solid scientific definition to whiplash that may help identify and establish soft tissue injuries--if any are actually suffered in the course of an accident.

Results from the study appear in the November, 2004 issue of Clinical Biomechanics. The findings, based on research begun at the university in 1999, will help clear up the murky definition of whiplash--injuries to the head and neck most commonly suffered in rear-end vehicle collisions, said Dr. Shrawan Kumar, a professor of physical therapy and neuroscience at the University of Alberta.

"Having a scientific framework for whiplash injects a great deal of objectivity into a subjective realm where there are a lot of legal claims and counter-claims. It clears up some of the mystery surrounding the condition," said Dr.Kumar, lead author on the paper.

Using 20 healthy volunteers and a special sled equipped with a rotating chair (complete with a seatbelt) and a pneumatic piston, the researchers measured the response of six different neck muscles to gradually increased low-velocity impacts from eight different directions. The muscle responses were measured using surface electrodes.

Each volunteer was fitted at the forehead and top of the back with accelerometers--devices which measured the effect of impact on the head-neck motion. The acceleration of the chair was also recorded.

The tests revealed that there was less risk of injury when the subjects had their heads turned either to the right or to the left at the time of low-velocity impact (up to 10 km/h). "The act of turn
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Contact: Bev Betkowski
beverly.betkowski@ualberta.ca
780-492-3808
University of Alberta
22-Nov-2004

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