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Edited on Sat Nov-12-05 09:38 PM by patrice
You've probably heard popular press about the localization of functions in the (peripheral and central nervous systems, including, obviously, the) brain. But if you try to look at the common features of all of the groups of functional structures, one thing that it all reduces to is events at the synaptic level, where millions upon millions of small chemical events result in what is referred to as consciousness.
Neural synapses are very intersting places governed by different groups of chemicals, some limited to single events, neuron to neuron, other neuro-chemicals acting in concert over networks and groups of structures simultaneously, meta-chemicals if you will.
There are many interesting questions about response thresholds (i.e. how much stimuli of what class does it take to trigger a responce, either one:one, or one:many, or many:many. Some things are known about the governing hierarchies (e.g. peripheral system is governed by the central system; the pituitary (gland) interacts with the thalmus (or is it the hypothalmus??) and together they govern groups of gland and nervous functions that affect major organ systems and muscles etc. etc. . . . As I was saying, some things are known about the governing hierarchies, but not everything, and certainly not in any and all environments (but mostly just those environments associated with "research").
Something many people miss is the difference between Sensation and Perception, which boils down to, not only do we not Sense everything out there that there is to sense . . . of what we do Sense, we do not "use" all of it. What goes in is not one:one with what comes out (i.e. consciousness). Perception filters and organizes a great deal of sensation. Perception is not 100% uniform in a population. There are a wide spectrum of perceptual functions possilbe, everything from basic to much more "emergent" kinds of functions. I like to think of tuning my (specific, relatively unique) instrument to the fullest of its potential, no matter how great or small that is, by how I live. Being fully alive has a higher value than achieving somekind of pre-defined state of mind that is usually more a matter of semantics than of un-mediated (immediate) experience.
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