One feature that is usually missed in discussion of spinal subluxations and their aetiology is the fact that spinal function occurs in an integrated and co-ordinated manner.
The body is designed to maintain stability of the head, the eyes and the arms while in motion. This feature is a necessary adaptation for any organism that hopes to survive in the wild. In this context it pays to note that humans have spent the vast bulk of our evolution as hunter gatherers, not as chair dwelling keyboard operators.
Of necessity, there is intimate co-ordination between head stabilisation, sacro-iliac joint mobility and foot motion. In this context, it pays to note that proprioceptive (position sense) information fed from the foot to the cerebellum is an essential input to the whole system.
While an injury at the atlanto- occipital joint will cause a pelvic tilt, and distortion of the biomechanics of gait and the foot, the reverse is also true:
minor mechanical foot deformities can have bottom up effects that can lead to occipitocervical problems. In fact the temporo-mandibular joint is also affected as a part of this system.
The aspect of foot involvement in the functioning of the atlanto-occipital joint has been comprehensively addressed by Prof/Dr Brian Rothbart.
His material can be accessed at his own website: