Loading of the Lumbar Spine During Transition from Standing to Sitting: Effect of Fusion versus Motion Preservation at L4-L5 and L5-S1

Transition from standing to sitting significantly decreases lumbar lordosis with the greatest lordosis-loss occurring at L4-S1. Fusing L4-S1 eliminates motion and thus the proximal mobile segments maybe recruited during transition from standing to sitting to compensate for the loss of L4-S1 mobility. This may subject proximal segments to supra-physiologic flexion loading.

Source: The Spine Journal - November 4, 2020 Category: Orthopaedics Authors: Avinash G. Patwardhan, J. Alex Sielatycki, Robert M. Havey, S. Craig Humphreys, Scott D. Hodges, Kenneth R. Blank, Muturi G. Muriuki Tags: Basic Science Source Type: research