Fig. 3From: Attainment rate as a surrogate indicator of the intervertebral neutral zone length in lateral bending: an in vitro proof of concept studyMechanical model of two successive vertebrae, modelled as having negligible thickness and uniform mass distribution. The figure shows action and reaction forces, net moments of force, and all linear and angular accelerations. Gravitational forces are ignored as they are not applicable in the plane of motionBack to article page