In the New York Times Magazine this last weekend, there was
an
essay about split brain
patients: those who has undergone surgical cutting of the corpus
callosum. Naturally, I had to blog about it. The
author, Jim Holt, starts by describing brain scanning techniques that
can reveal various things about how a human brain is working.
He laments the loss of "the comforting notion that each of us has
privileged access to his own mind." He describes other
findings, such as neuroplasticity; specifically, findings that indicate
that the brain can rewire itself in response to external and internal
environmental changes, then adds:
But there could be
revelations in store that will force us to revise
our self-understanding in far more radical ways. We have already had a
hint of this in the so-called split-brain phenomenon. The human brain
has two hemispheres, right and left. Each hemisphere has its own
perceptual, memory and control systems. For the most part, the left
hemisphere is associated with the right side of the body, and vice
versa. The left hemisphere usually controls speech. Connecting the
hemispheres is a cable of nerve fibers called the corpus callosum. [...]
Mr. Holt develops the idea that discoveries in neuroscience threaten to
alter our understanding of ourselves in discomforting ways.
The more
that breakthroughs like the recent one in brain-scanning open up the
mind to scientific scrutiny, the more we may be pressed to give up
comforting metaphysical ideas like interiority, subjectivity and the
soul. Let's enjoy them while we can.
I had to
look
up the word,
interiority.
Apparently it refers to either:
for the
purely inequality system with g convex, it means there exists x for
which g(x) < 0. More generally, for a mathematical program in
standard form, it means there exists x in X for which g(x) < 0
and h(x) = 0;
or, it refers to
focusing and
concentrating on the importance of self and, above all, on the God
within, rather than on things "outside" (ie, material possessions.)
The implication is that, perhaps, it may become more difficult for
humans to experience a spiritual dimension to their lives, as we come
to understand more about the physics and chemistry of brain function.
That notion is something that I used to worry about, but no
more. It seems to me that it is similar to the notion that
human dignity is diminished through the use of performance-enhancing
drugs, or that the institution of marriage is diminished if other
people run their marriages in a way that is different than what you
think is proper. Personally, I don't agree with any of those
notions.
Analyzing the optical properties of a rose petal does not make the rose
any less beautiful. Likewise, understanding the anatomical
and chemical basis of perception does not alter the value of the thing
perceived. Human dignity is not a property within the human
being observed; it is a property ascribed by the observer.
Marriage is what you and your spouse make of it; what others do in
their marriages is irrelevant.
I would say that, if one finds that scientific advances diminish one's
spiritual experience, it is because it distracts from the spiritual
experience, much as material possessions do. The only
difference is that when one possesses scientific knowledge, is not a
material
possession. Neuroscientists
need not worry about the effect
that their research has on the spirituality of others. What
other people do inside their heads is their business, and it is up to
them to create
the experiences that they want to have.