Here is a study that showed cadaver specimens that were rear ended at what many insurance companies would call "low speed". Basically, many different structures got damaged in the impact. The authors imaged the spines before and after. The next time some insurance company says the diagnosis of ligament or facet or discs do not get injured in crashes, show them this and validate your care.
Stapp Car Crash J. 2000 Nov;44:189-204.
Biomechanics of human occupants in simulated rear crashes: documentation . . .
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