Wow, that is really fascinating! Is it scientifically validated? Spiritualists like Buddhists etc will often use scientific terminology but in a very loose way. I wonder if they're just saying that's the source of the Observer (etc) because it looks like the Eye of Horus? Though being located right there between the lobes of the brain at the top of the brainstem, and so close to the Corpus Callosum (which is the nerve bundle connecting left and right hemispheres), it seems ideally situated to be a go-between - a Hermes, messenger of the Gods who carried communications between Man and the Gods. And Hermes (Greek) is another symbol of the Self, known as Mercurius to the Romans and Thoth to the Egyptians.
Jung identified Christ as a symbol of Individuation/The Self, and of course Buddhism (isn't Vedanta a branch of Buddhism?) keeps updating, unlike most ancient religions. It keeps incorporating scientific findings into itself, even if sometimes they need to be distorted somewhat to really fit. And of course one of the big upgrades it incorporated were Jung's theories. I love looking into the various religions, spiritual systems and mysticism etc, but I always try to compare it back to Jungian findings since he approached it all with true scientific rigor. I see him as the great consolidator of all the ancient spiritual/religious wisdom and mysticism, who figured out what it all really meant or referred to - whereas they always saw it through unconscious projection because they didn't understand the nature of the Unconscious. They tended to put the cart in front of the horse so to speak, and understand it all as being real when it's really symbolic, though that does nothing to reduce the true numinous power and transformative capabilities of it all. Symbols, being able to move freely between the conscious and the unconscious, do have powerful transformative capabilities, so they are not "mere" symbols, but carry all of the power that God or any God ever carried.