Reviewed and updated by Steven M. Sweat, September 2026 KEY TAKEAWAYS Rear-end collisions account for approximately 29% of all serious injury crashes in the U.S. Injury depends on acceleration forces (delta-V)—not the amount of vehicle damage. Whiplash involves hyperextension followed by hyperflexion of the cervical spine, causing ligament micro-tears and facet joint compression. The majority…
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