How's that for a provocative title? As we'll see, it's not
as crazy as it sounds! In fact, this post is about a semi-recent
scientific study that was reported in Nature and Scientific American
not all that long ago.
My most recent blog post before this one discussed alternative
models for the mind/brain problem, or the "
hard problem of
consciousness", which attempts to answer how conscious,
subjective inner experience (i.e. qualia) can arise from unconscious
matter. These alternative models assume that consciousness is
primary and does not arise from matter. Instead, they hold that the
brain acts as an intermediary, or as a reducing valve, or filter, or
in a fashion similar to a 2-way radio transceiver. You can
poke, and prod the circuitry in a radio as much as you want looking
for the source of the transmission, but you're missing the point
until you realize the radio is not the source. The broadcast
waves exist separate and independent from the radio. It's best
to realize these are all just meant to be crude analogies to help us
start looking at the problem in a different perspective, or from a
consciousness-first perspective. So, we shouldn't take them too
far. Of course, all these analogies are opposed to the more
popular matter-first perspective, which assumes that the brain
produces consciousness, which would be the more natural assumption in
the eyes of most.
So, the obvious question to ask
would be, is there any evidence that trumps one
perspective over the other? At this point the answer is no.
However, lets look at what one might conclude based on each perspective.
If the brain acts more like a filter one would expect that if the
filter is "shut off" we would have unrestrained cognition,
or an enhancement in perception. Near Death Experiences seem to confirm this, but the jury is still out. On the other hand, we would
expect the opposite if the brain produces consciousness. Under
this model, the more intense the brain activity, the more intense the
conscious experience. No brain activity would mean no consciousness,
which is the materialistic view of death.
Now, let's apply this to psilocybin - the chemical agent
responsible for the intense high, or the intense conscious
experience, associated with hallucinogenic mushrooms. A
study was recently done in the UK which investigated the brain
activity of folks under the influence of psilocybin. Of course,
the obvious expectation in line with the "
brain produces
consciousness" perspective is that these guys would have their
brains lit up like Christmas Trees under fMRI scanners. On the
contrary, they found an overall reduction in brain activity, which is
in correspondence of what one would expect if the brain acted as a filter, while the psilocybin "loosened" the filter a bit.
To be fair, mainstream neuroscience has come up with ideas in an
attempt to explain findings like these. One posits inhibitory
brain processes in one area allowing excitatory process to grow
unchecked elsewhere. However, there was no increased activity
found
anywhere in the brain during the psilocybin studies.
Ultimately, the problem really comes down to the fact that all
mainstream theories are unproven and fall short of their ultimate
goal. As David Chalmers points out, we have made essentially
zero progress in the last 100 years on answering the question of how
inner conscious experience can arise from matter. Similarly,
the "
consciousness is primary" camp isn't exactly
able to say how the brain acts as a filter, or receiver, nor can they
definitively point "out there" to some field of
consciousness.
However, even the Nature and Scientific American articles
(referenced below) note the following.
"In his 1954 book The Doors of Perception, novelist Aldous
Huxley, who famously experimented with psychedelics, suggested that
the drugs produce a sensory deluge by opening a “reducing valve”
in the brain that normally acts to limit our perceptions." *
"The new findings are consistent with this idea, and with
the free-energy principle of brain function developed by Karl Friston
of University College London that states that the brain works by
constraining our perceptual experiences so that its predictions of
the world are as accurate as possible." *
As hinted at in the quotes above, there could indeed be a survival
advantage to the brain acting as a filter, thereby limiting conscious
experience. One does not need to be distracted by other
ethereal realms, or angels, while being stalked by a saber tooth
tiger! The body evolves within and for efficient function in
this world, not the next.
The consciousness-first perspective also jives up with the age old
wisdom from cultures around the world. I'm currently reading a
book by Sri Aurobindo called "The Life Divine".
Aurobindo talks about the natural and ultimate state of all things,
which is referred to as Sat-chid-ananda. Sat means being,
existence, the thing that truly is. Chid means knowledge, or
the free, all-creative self awareness of the Absolute. Ananda
means Bliss, or Beatitude, or refers to the self-delight which is the
very nature of the transcendent and infinite existence. This
refers to the original state of unity, which I discuss in my
Middle
Way, Part II blog post. The idea that Aurobindo puts forth
is that this unity is reduced into multiplicity, at least partly, by
ego consciousness. One could then view the brain as the house
of ego consciousness, or the tool which enables the ego experience,
or which filters the state of unity down into multiplicity.
How will we eventually know which perspective on consciousness
is the correct one? I see this potentially playing out in
several ways. (1) A study like AWARE unambiguously shows that
consciousness can exist independent of the brain. (2) The
accumulating evidence for psi becomes undeniable and perhaps backed
up by a compelling theory. (3) Psi and spiritual experiences
become common enough amongst the population to where it will become
natural to view consciousness as more than just the brain. Or,
(4) enough experiments like the one talked about here will make the
consciousness-first perspective the more parsimonious viewpoint.
In reality, it will probably end up being an interplay of all these
factors, plus ones I did not think of, that ultimately bring about an
acceptance that consciousness is indeed primary. As you can
tell, I do feel fairly confident things will eventually trend in this
direction, although I can't be sure.
Factor 4 is very similar to what may be currently happening within
Quantum Mechanics. There are two formulations of Quantum
Mechanics I have been following: (1) the popular interpretation of QM
where time is linear and unidirectional, which is our normal way of
viewing time; (2) the time symmetric formulation (TSQM) which has a
richer view on time, including a type of retro-causal influence.
Although they sure don't sound like they would be, these two theories
turn out to be mathematically equivalent, i.e. they make the same
predictions. Therefore, no single experiment can trump one over
the other, at least as far as we know. Ten to fifteen years
ago, TSQM was not given a high level of consideration. Why
evoke such an exotic concept of time when it provides no extra
value? Since then, however, a number of modern experiments have
been done that are actually more simple and elegant to explain within
the TSQM framework, while being convoluted within the standard QM
framework. Therefore, more physicists are beginning to find
the TSQM framework compelling. But, the jury is still out on
which view truly represents physical reality. More on this in a
future blog post! Perhaps more experiments could make the
"
consciousness is primary" model more compelling in a
similar fashion.
I think all this shows, once again, that it is best for us to keep
an open mind on the mind/brain problem, while waiting to see where
the evidence takes us.
(*)
Psychedelic
chemical subdues brain activity, Nature
(**)
Hallucinogenic
Chemical Found in Magic Mushrooms Subdues Brain Activity,
Scientific American
(***)
Neural
correlates of the psychedelic state as determined by fMRI studies
with psilocybin, Original Paper Found In Proceedings of the
National Academy of the Science, PNAS
(****)
Disembodied
Trippers by Bernardo Kastrup, for analysis similar, but superior,
to my own.