Kundalini means “a spiritual energy or life force located at the base of the spine,” which is usually conceptualized as a coiled-up serpent. The practice of Kundalini yog is supposed to arouse the sleeping Kundalini Shakti from its coiled base through the six chakras that reside along the spine. The seventh chakra is also called crown chakra. Chakras are hubs of energy along with it, Pran (Life Force) travels to distribute energy throughout the body.
LOCATION OF CHAKRAS:
The lower chakras are mostly situated in Ethric and Astral bodies in various state of activity. They are also seen in astral and concrete mental body except Vishuddh and Anahat which are contained in lotus of soul at higher mental plane.