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Message
From: Richard Herveille <richard@a...>
Date: Fri, 14 Feb 2003 09:22:00 +0100
Subject: Re: [oc] Beyond Transmeta...
>
> This is correct while the signal is travelling in a single nerve cell,
> however the propagation at the interfaces between cell's are limited by
> ordinary diffusion, which slows it down a bit ( quite a lot ).
Correct the axons in more modern beings are covered by a special coating. This
coating decreases the propagation delay from cell to cell considerably. Think
about it in ways of a highway; cars can go fast but only straight, they have
to wait for the next exit before they can make a turn.
The propagation delay from cell to cell - or better everywhere where there's
no special coating - is very slow actually. There's a reason why lower
animals react more slowly than higher animals besides being cold blooded vs.
warm blooded (which is, among other things, a reaction to higher nerve
throughput).
> I think the batter hit's where he expect's the ball to be, and I am
> not to sure that not the visual cortext can bypass to ( the little
> thingi in the back, I don't know its brittish name ) in order to get the
> batting done. Also I don't think the batter think, I think he is
> reacting by using a trained curve fitting algorith.
In Europe we would probably talk about a football keeper stopping a penalty
kick. Both reactions are reflexes. Trained curves that do not need any
response from the brain (!!!), because the brain is way to slow to deal with
them. A reflex is the fastest response possible by nerves. The initiator
sends a signal the the nearest most primitive motion nerve knot (usually the
spinal court), the nerve knot immediately responses.
A good example of this is your hand/arm backing off when you touch something
hot. The hand/arm already backed off, before your brain 'knows' the item was
hot.
> Actually the brain doesn't signal process at 20 kHz, the ear does a
> fft ( by it's construction ), and the brain matches the signal processed
> data against a template, also no 'thinking' involved.
In brains terms thinking is pattern matching. It's a matter of being aware
that it happens (cognitive versus non-cognitive), your hart beats without you
having to tell it to beat each time. On the other hand only a few people
'know' how to control their hardbeat (some can even stop the hart at will).
> >> however it is good at hiding it's own fallancies.
> >
> > At least the brain can imagine that it is hiding it's own fallacies.
>
> Not so, my brain certainly has no such alleged fallancies ! ;-)
A good example of a brain hiding it's fallacies :-))
> Seriously, it would be interesting to know how much thought that went
> into different matters, and how much pattern matching and so on the
> brains does.
>
Even more interresting is the left/right side story. It appears that one side
responses to an event, and the other side tries to explain the reaction.
Example: split brain persons (persons where the connection between the left
and right side of the brain are destroyed) are shown pictures, each eye a
different picture. Classic example is where one eye sees a naked women, and
the other a car. Common reaction - at least for men - is to giggle. When
asked why they giggle they respond that it was a funny car.
Richard
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