Rotational preconstraint theory

This theory is pretty straight forward and not too complex......on the surface. It basically states that paravertebral muscle imbalance with interference of the postural reflexes and body weighted related verticle loading lead the formation of scoliosis. The lingering question is....... what causes the interference of the postural reflexes?

This study on frogs may hold some clues.....


Vestibular asymmetry as the cause of idiopathic scoliosis: a possible answer from (Frog) Xenopus.

Lambert FM, Malinvaud D, Glaunès J, Bergot C, Straka H, Vidal PP.
J Neurosci. 2009 Oct 7;29(40):12477-83.
Centre National de la Recherche Scientifique , Unité Mixte de Recherche 7060-Université Paris Descartes, 75006 Paris, France.

Human idiopathic scoliosis is characterized by severe deformations of the spine and skeleton. The occurrence of vestibular-related deficits in these patients is well established but it is unclear whether a vestibular pathology is the common cause for the scoliotic syndrome and the gaze/posture deficits or if the latter behavioral deficits are a consequence of the scoliotic deformations. A possible vestibular origin was tested in the frog Xenopus laevis by unilateral removal of the labyrinthine endorgans at larval stages. After metamorphosis into young adult frogs, X-ray images and three-dimensional reconstructed micro-computer tomographic scans of the skeleton showed deformations similar to those of scoliotic patients. The skeletal distortions consisted of a curvature of the spine in the frontal and sagittal plane, a transverse rotation along the body axis and substantial deformations of all vertebrae. In terrestrial vertebrates, the initial postural syndrome after unilateral labyrinthectomy recovers over time and requires body weight-supporting limb proprioceptive information. In an aquatic environment, however, this information is absent. Hence, the lesion-induced asymmetric activity in descending spinal pathways and the resulting asymmetric muscular tonus persists. As a consequence the mostly cartilaginous skeleton of the frog tadpoles progressively deforms. Lack of limb proprioceptive signals in an aquatic environment is thus the element, which links the Xenopus model with human scoliosis because a comparable situation occurs during gestation in utero. A permanently imbalanced activity in descending locomotor/posture control pathways might be the common origin for the observed structural and behavioral deficits in humans as in the different animal models of scoliosis.

Translation:

"Vestibular dysfunction PLUS lack of proprioceptive feedback has now been proven to create scoliosis.

Also proven: the root cause of scoliosis can be reversed by restoring correct proprioceptive feedback from body to brain."