I feel I connect with my pineal as my inner light, initially found this using raja yoga, mind yoga if you like, meditation connects, being at one with surroundings connects.
I know you are well aware of Tom Campbells work (which I like, however I feel he is getting stuck in the science stuff and not coming to the startling conclusions that are possible.
considering some of Dan Winters work is enlightening,and combining with some of Persinger's conclusions.http://www.youtube.com/watch?v=VBnj_iQvhSIhttp://www.youtube.com/watch?v=9l6VPpDu ... r_embedded
now consider that inner light in the pineal crystal, as a photon in quantum physics, that exists in superposition (in everything, everyone at all places in all times) and yet only in one position when confined to three dimensions at one particular point in time. On our plane of existence, this behaves as a particle, with various other quantum possibilities of the self (the inner light) manifesting as hopes , fears, a too strong a bond with a past instance of the self can cause depression, or a future instance anxiety: hence the importance of becoming centred, being totally present is the mind combining all possible instance of the self through cutting fears , anxiety through love and understanding.
My hypothesis being that when you can be centred and at one in this way, your pineal allows your inner light/particle to behave in wave form and be a part of a single field of consciousness.http://www.youtube.com/watch?v=1_HrQVhgbeo
linking to the fourth dimension as Carl Sagan explains it so wellhttp://www.youtube.com/watch?v=UnURElCzGc0
past quantum versions of the self that you are too entangled with still, may manifest as orbs, spectres, even when you are still alive. I still have echoes of a woman who was very sad in the house I now live, I know she is still alive.
looking forward to reading your hypotheses,, and apologies for my maybe over simplistic science,, I am trying almost to describe the metaphysical with the metaphorical