Kundalini is an exogenous and endogenous fact of physical and mental, emotional and spiritual convergence in my experience. All at the same time.
As far as the stimulation, anatomical valuation of the energetics of Kundalini can be helpful if one is based in those theoretical constructs for comprehension. My approach is more inclusive, for me, in that the gross physicality of the body as a whole will be rewired to conform to the intention and essence of the Kundalini agenda.
This is oriented within the parameters of the initial diffusion of energy that continues for the life of the person and expands through all areas of human expression.
The agenda can be described as being genetically based as the Kundalini will follow the paths outlined by the human organism with the coalescing of the energetic bodies into the physical and vice versa. There is no such thing as junk DNA - blessings - chrism
... the gross physicality of the body as a whole will be rewired to conform to the intention and essence of the Kundalini agenda.