This week we are talking about all things "chakra." Where did they come from and how have they changed over time. We dig into the details of the "modern" or "western" chakra system before going back in time. The chakras find their origins in another practice of purifying the elements of the body. Over the centuries, many different chakra systems appear, until the modern age when the 7 chakra system gains prominence. This modern system has a few distinct traits, especially that there are 7 of them, they are associated with the nervous system or glands, they are rainbow colored and associated with psychological states. 

Referenced:
Roots of Yoga by Mallinson and Singleton
Yoga Body by Mark Singleton
The Serpent Power by Arthur Avalon
Rainbow Body by Kurt Leland