All I can say is that I'm thankful I'm not on Nelson then. I've put up the front view of the spine as well. Yes, the vertebrae is compressed & fractured. The compression puts pressure on nerves as they exit the spinal column, resulting in pain & altered sensation. Potentially, I'll be shorter than I was. I don't know the answers to your questions. I think of this as an over extension injury. I'm guessing the weakness in the back / legs is in part due to torn muscle / ligament. My orthopaedic surgeon is confident that things will heal with no intervention (except needing to wear the brace), & no longer term issues.