Hi Stephen,
On 17 Aug 2011, at 16:08, Stephen P. King wrote:
Hi,
Recently a link was referenced that discussed how serial
sectioning of brains is being automated: http://www.mcb.harvard.edu/lichtman/ATLUM/ATLUM_web.htm
I have a question about this. Will this technology yield a model
of the dynamics of brain activity or will it be another taxonomy of
brain structures? It seems that dynamics are completely missing from
the narrative about scanning and uploading our brains into Turing
Machines. How exactly is a topological map of the structure of the
brain contain any information about the specifics of brain activity?
At best it might allow us to toss out models of dynamics that
have implications that would contradict the topology structure, but
nothing at all about how the topologies evolve.
I don't find the references now, but I remember having read that some
animal, like frogs, can freeze and resume the brain activity after
that. Some experience on rat shows that long term memory is preserved
in freezing, and that during freezing the activity of the brain is
really near zero. Short term memory is not. A cryogenized person might
survive with an amnesia of the last 5-6 minutes.
The dynamic of the brain is coded in the neurotransmitter
concentrations, not in the ionic potential along the axions. That
might be an argument for saying that the comp subst. level *might* be
high.
Bruno
http://iridia.ulb.ac.be/~marchal/
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