The nine-centre scheme is one of the clearest examples of Human Design's method of synthesis: it takes the familiar seven chakras, splits and rearranges them, and integrates them with the I Ching gates and the astrological calculation into a single diagram. The atlas notes this derivation, treating the centres as part of a modern system.
The atlas gives each centre its themes, its defined and open meanings, and its place in the bodygraph. The chakras the centres derive from, and the channels and gates that connect them, are treated in their own categories.