====== Flatback syndrome ====== Condition in which the lower spine loses some of its normal [[curvature]]s. It is a type of [[sagittal imbalance]] or front-to-back imbalance in the spine. In most instances, [[sagittal imbalance]] is due to a shortfall of [[lumbar lordosis]] (LL) relative to the [[pelvic incidence]] (PI) (i.e. LL is more than 9° below PI), which is designated as [[flatback syndrome]]. ===== Iatrogenic Flatback Syndrome ===== [[Iatrogenic Flatback Syndrome]]