Adolescent brains, it turns out, are different from adult brains in at least one way.
As neuroscientist Deborah Yurgelun-Todd has found, adolescents use a different part of their brain than adults in responding to emotional states.
It is tempting to see this as an argument against the notion that "adolescence" is a cultural phenomenon that is destructive to most teenagers. After all, if science shows their brains are different, then that removes any question of where adolescent behavior comes from, right?
Not quite. The argument depends upon the assumption that biology is static--that is, it depends upon the assumption that the brains of 13-18 year-olds have always been different than those of individuals aged 30-60, for instance. For this argument to work, biology--or more specifically, neurobiology--must be "given." That is, the brain must be a stable entity that is not subject to change based on mental, spiritual or--as I am mostly interested in here--even cultural or societal forces.
There is, however, some reason to think this isn't the case. I'll provide three examples that call into question the static nature of corporeality:
In essence, the notion that the body is just the body is dubious. And the notion that the only sources of physical change are physical is equally doubtful.
The proposition, of course, may not be that interesting to those who adhere to the theory of evolution. For them, the physical structure--the form of matter, if you will--of natural entities is always in flux. But still, this leaves the causes of such changes as an open question.
What implications might the non-fixity of corporeality have for us? It means that we can't turn to science alone if we want to understand the physical world, as the causes of physical phenomena may not be physical. And here I do not mean to enter into an "intelligent design" debate, but rather simply point out that in attempting to understand the reason for the particularities of adolescent brain structures (for instance), we should not be overly reductionist in our attempts. Rather, if we understand the physical world, we must understand the whole world--the historical, mental, social and (yes, even these) theological forces that shape the physical world.
On a theological level, the question for Christians is not, "body or not body?" but rather, which type of body? A body governed and empowered by the Spirit or a body governed and empowered by the powers and principalities of this world? If the body isn't "given," then we must be aware of the ways in which culture shapes it and be prepared to reshape it according to the image of God.
It is my hope that I am wrong. I want corporeality to be "fixed." It would, if nothing else, make understanding the world far more simple. But if, as I have argued, it is not, then we need to ensure our approach to reality fits reality itself. And that means employing robust, multi-disciplinary accounts.