There are six chakras or energy vortexes that lie along that tube. There is a seventh chakra located several inches above the head, but it is not connected.
Frederick LenzWhen you eneter into samadhi and seek to make that magical walk between salvikalpa and nirvikalpa samadhi, it's necessary to focus your awareness not on being or nonbeing.
Frederick LenzThere are seven primary centers, junctions, within the subtle physical body. These are called the seven chakras.
Frederick Lenz