Sublime

As cells divide they organize into a line called the primitive streak or midline. All spine-based organisms, such as us, begin with a midline, with all else emerging from and returning to the center. Continuing this developmental journey, the midline, the notochord, the primitive brain, and the primitive tube unfold and enfold into what we commonly

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Many theories of upright two-legged (bipedal) human movement suggest the legs authorise or initiate gait and the torso, or axial body, “travels along as a passenger”. As Gracovetsky points out, from an evolutionary point of view: “Locomotion was first achieved by the motion of the spine. The legs came after as an improvement, not as a substitute.”1

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As human beings, we might organise from a “centrifugal sense”; however, there is no straight vertical axis for the body in its physical experience. It is curved. Our “null point” of embryonic development (see Ch. 5) forms ideally into a changing, continuous S-shape, just as Leonardo da Vinci first drew it. We use it as an upright reference but that

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