Whiplash-associated disorders (WAD) injuries are described as involving the intervertebral disc (IVD). Which structure is most commonly implicated according to the material?

• A. Soft tissue
• B. Ligaments and joint capsules
• C. IVD
• D. Vertebral artery lesions

Answer: (C)

In whiplash injuries, the intervertebral disc is central because the rapid acceleration–deceleration forces place the greatest shear and distraction stress across the disc spaces between cervical vertebrae. The annulus fibrosus can tear and the nucleus pulposus can shift under these loads, leading to discogenic pain and, in some cases, disc bulging that irritates nearby neural structures. The disc’s position and its role in load transfer make it especially vulnerable in these quick neck movements, so many texts describe the disc as the structure most commonly implicated in WAD injuries. This focus helps explain why pain patterns after whiplash often reflect disc-related mechanisms and why rehabilitation and imaging considerations frequently address disc health.