The notochordal process is a crucial step in embryonic development, characterized by the formation of a dome-shaped structure. This process begins without the presence of the embryonic pedicle, meaning that the trophic source is directly at this location. The ectodermal tissue, which is above, loses its polarity and ceases to absorb, thus becoming a support point for developing structures. This phenomenon is accompanied by the emergence of Hensen's node, which acts as a suction field, creating a space between the ectoderm and the endoderm, and promoting the movement of epithelial cells towards the center.
This cell movement is essential for the formation of the mesoderm. The cells, by compressing and adopting a bottle-cell shape, release hyaluronic acid, a key component for subsequent structuring and protein manufacturing processes. The dynamics of this suction field, associated with the presence of nodal fluid within the notochord, influence the speed of cell development. Cells located in the dome multiply faster than those on the same line but converging, thus illustrating the importance of spatial interactions and growth gradients in embryonic development.
Marc Damoiseaux covers the practical application of this tissue listening in his video modules. The entirety of the ectoderme movement is dissected.
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