A contribution to the study of the mechanics of the spine

Three-dimensional kinematics of the lumbar spine during gait using marker-based systems: a systematic review

“…For example, the compensatory movements created as a consequence of a leg length discrepancy have been shown to induce both a lateral flexion and axial rotation of the lumbar spine. [14,15] Moreover, such coupled motion in the frontal and transverse plane is a functional characteristic of the human spine, [16,17] which can be altered in the presence of LBP. [18] An alternative method is to use a 3D cluster.…”

Adolescent idiopathic scoliosis: The mechanobiology of differential growth

“…It essentially occurs through a mismatch between the elongation of two tissues attached to each other and results in bending and torsion. Crijns and colleagues used a physical model of a growing thoracolumbar spine to show that an impeded elongation of the tendons leads to internal compression of the spine, which first straightens and then slowly warps out of the sagittal plane by lateral bending and ‐inevitably 57 ‐ axial rotation (Figure 4). 15 It should be emphasized that no external load was applied to the spine model, which implies that scoliotic deformations do not result from classical Euler buckling.…”

Is the lumbodorsal fascia necessary?

“…Indeed, Lovett (1903) discovered the so called coupled motion of the spine (Figure 2). Panjabi (1977) formally studied how lordosis affects the conversion of a lateral bending torque into an axial torque.…”