Whiplash injury is damage to
**Core Concept**
Whiplash injury is a type of soft tissue injury that occurs when the neck is rapidly accelerated or decelerated, causing damage to the ligaments, tendons, and muscles in the cervical spine. This injury is commonly associated with rear-end motor vehicle collisions.
**Why the Correct Answer is Right**
The mechanism of whiplash injury involves the sudden stretching and tearing of ligaments and tendons in the cervical spine, particularly the posterior longitudinal ligament and the ligamentum flavum. This occurs due to the rapid extension and flexion movements of the neck, which can cause micro-tears in the soft tissues. The injury can also lead to inflammation and pain in the affected area.
**Why Each Wrong Option is Incorrect**
**Option A:** Damage to the facet joints in the cervical spine is not the primary mechanism of whiplash injury, although facet joint sprain can occur as a secondary consequence.
**Option B:** The vertebral bodies and discs in the cervical spine are not directly damaged in whiplash injury, as the forces involved are typically not strong enough to cause bony injury.
**Option C:** While the spinal cord can be affected in severe whiplash injuries, particularly those involving significant flexion or extension, the primary damage in whiplash is to the soft tissues surrounding the spinal cord, rather than the cord itself.
**Clinical Pearl / High-Yield Fact**
The "whiplash associated disorders" (WAD) classification system is used to grade the severity of whiplash injuries, ranging from Grade 1 (mild) to Grade 3 (severe). This classification system helps guide treatment and management decisions.
**Correct Answer:** D.