DOI link for Cross-Lateral Connectivity
Cross-Lateral Connectivity book
We come now to the final stage of our basic bodily differentiation process-that of crosslaterality. This is the most complex pattern in the basic developmental sequence. Now we are able to creep on hands and knees and eventually to walk. Opposite arm and leg swing forward to facilitate the transfer of weight. This seemingly simple ability is the result of a long developmental progression, as you know from having read this book. To get to this point, we have previously differentiated each limb in relation to center core, become individuated as spines, discovered the role of the upper and the role of the lower, and claimed distinctions in sidedness. With cross-laterality we now find connections between body quadrants.1 We open passageways or highways diagonally through our core, enabling us to cross movement in a connected way from one side to the other as well as up and down and forward and back. This happens in a basic walk, and, of course, in more complicated movement, such as a tennis serve. For instance, if I serve with my right arm, I end going around down and back to the left as I finish the serve; I am connecting right and left, up and down, and forward and back. The movement is transverse in space and requires a diagonal connection bodily (going from my right arm crossing down and across through my torso to my left leg as I step forward to complete the serve). A more common example of Cross-Lateral movement might be reaching up to climb a ladder and having the opposite leg automatically available to step up.