From what I remember from Robert Bruce's book "Astral Dynamics" at every joint we have energy vortex points. We also have minor chakras in addition to the 7 major ones as well as 5 more that are above our head and exist interdimensionally.
Here is a diagram that shows the minor chakras.
http://lh3.ggpht.com/_QFKrkbTOX_8/TF...00/centers.jpg