CAD Quiz Contest #1
By Arthur Croft, DC, MS, MPH, FACOQuizzes are fun. I usually can't pass them up. So, every once in a while, I make up my own quiz to let readers find out what they know about this important topic.
CAD is the acronym for cervical acceleration/deceleration, a.k.a.whiplash. But this time I thought it might be fun to provide a little incentive, especially since it is the holiday season. So here's the deal: I'm making the quiz somewhat challenging, and the answers will be posted on my website (www.srisd.com). After the contest is over, which will be exactly two weeks after this issue is published. The highest score wins. In the case of a perfect score or tie, the earliest post gets the victory. Answers should be posted to my website. The prize is a $150 gift certificate toward any of the products or services listed on the website. Good luck.
1. Based on the latest model of CAD injury, which of the following answers correctly lists the forces to which the neck is exposed during rear impact crash loading, and does so in the correct order of occurrence?
a. Compression, tension, shear and bending.
2. In Europe, black boxes have been placed under the driver's seats of thousands of cars since 1996. In what country has this been carried out?
3. What is the acronym given to these devices?
4. The latest interest in CAD research concerns another acronym: NIC. What do the letters represent?
a. Neck index of compliance.
5. What is the mean acceleration of a vehicle that experiences a delta V of 5 mph over the course of 100 milliseconds?
a. 35 g.
6. Which statement concerning the crash described in question 5 is most correct, assuming it is a rear impact crash?
a. The driver's delta V will also be 5 mph.
7. Which of the following are not recognized as occupant risk factors in low speed crashes?
a. Non-use of seat belt/shoulder harness.
8. Based on research by Bogduk and others, one of the most common generators of neck pain in those suffering from the late effects of CAD injury is:
a. The disc.
9. What percent of the "normal" population has a flattened or reversed cervical curve?
a. About 0.5%
10. In a "false start" type of rear impact crash, the lead car starts off from a stop (usually at a traffic signal) and then stops again due to traffic. The driver of the rear car doesn't notice the second stop and strikes the first car. Assuming that the driver of the rear car travels eight feet at a uniform acceleration of 6 fps,2 what will the closing speed at contact be?
a. 6.7 mph.
Director, Spine Research Institute of San Diego
San Diego, California
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