imbalance of 1) Cranio-cervico-mandibular system 2) Pelvic system 3) Feet/gait complex, these are the key points.
Spinal system can be restored with a resetting of cranio-mandibular system in 3-5 treatments.
Actually is my opinion that spinal column is an adaptative, high compensative structure, but not a primary system (just my opinion)!