Consciousness is Not Confined to the Brain
While, according to Western conceptions, the brain is the exclusive seat of consciousness, yogic experience shows that our brain-consciousness is only one among a number of possible forms of consciousness, and that these, according to their function and nature, can be localized or centered in various organs of the body. These “organs,” which collect, transform, and distribute the forces flowing through them, are called “chakras,” or centers of force. From them radiate secondary streams of psychic force, comparable to the spokes of a wheel, the ribs of an umbrella, or the petals of a lotus. In other words, these chakras are the points in which psychic forces and bodily functions merge into each other or penetrate each other. They are the focal points in which cosmic and psychic energies crystallize into bodily qualities, and in which bodily qualities are dissolved or transmuted again into psychic forces.
Lama Govinda
from Foundations of Tibetan Mysticism