In my view, both are impacted by gravity, but they describe how resulting postural distortions occur, very differently.

Biomechanical Postural Model: A structural varus deformity is unstable in a gravitation field.

• Gravity pulls that foot forward, inward and downward (gravity drive pronation) until it rests on the ground.
• The rest of the postural complex follows this foot collapse.
• Termed BioImplosion, simply stated, so goes the foot, so goes the entire postural complex (foot to jaw).

Rothbart’s Neurophysiological Postural Model : Rothbarts Foot and the PreClinical Clubfoot Deformity are unstable in a gravitation field.

• Gravity pulls these feet downward until the medial column rests on the ground.
• This shifts the body’s CoP medially, which shifts the pattern of Meissner Corpuscular activation medially.
• This pattern of activation is transmitted to the brain stem (e.g., the Foot’s Sensory Feedback).
• The cerebellum decodes this as standing or walking on an inclined surface and automatically places the body in a forward lean pattern.

Both models attribute postural distortions as a result of foot deformities. But the descriptions of how this occurs are totally different.

· One describes the ultimate postural shift due solely to gravity.

· The other describes the ultimate postural shift due to the programming in the cerebellum.

This makes the interventions totally different. The former replies on orthotics to support the feet, the latter uses proprioceptive insoles to reprogram the CNS.