Primitive Cranio-Sacral Axis

During the second week of embryonic development, the formation of the notochord from the S-shaped epiblastic process marks a crucial stage in embryonic architecture. Hensen's node, or primitive pit, serves as a fixed fulcrum and moves posteriorly, playing a fundamental role in the structuring of the cranium, which integrates elements such as the pituitary gland, the greater wings of the sphenoid, as well as the petrous and occipital systems. In parallel, the development of the sacrum begins, highlighting the importance of a free sacrum to ensure functional unity between the spine and the base of the skull.

The dynamics of the notochordal axis directly influence the freedom of movement of the sacrum, essential for the proper functioning of the spine. A blocked sacrum can lead to dysfunctions at the base of the skull, thus affecting flexion-extension and causing an imbalance between the neurocranium and the viscerocranium. This interaction is reinforced by ectodermal growth pulling upwards, while the primitive node descends towards the sacrum, creating an area of importance for protein information related to the mother. Ancestral images blocked between the sigmoid and the bladder can have repercussions on urogenital problems, highlighting the importance of sacral downward migration in this process.