Axon collaterals ?

nettron2000 at aol.com nettron2000 at aol.com
Wed Dec 17 18:19:38 EST 2003


Joe Legris <jalegris at xympatico.ca> wrote in message news:<3FDFBB23.6060108 at xympatico.ca>...
> Matthew Kirkcaldie wrote:
> > In article <Xns94539459E651FBilZ0rhotmailcom at 202.20.93.13>,
> >  BilZ0r <BilZ0r at TAKETHISOUThotmail.com> wrote:
> > 
> > 
> >>Yes, its very common. Just often another way a cell mediates negative 
> >>feedback.
> > 
> > 
> > Why would an autapse from an excitatory neuron constitute "negative 
> > feedback"?  It would be a positive feedback loop if anything.
> > 
> >          Matthew.
> 
> Positive feedback might make a neuron "bursty" - so that any time it 
> fires, there's a good chance it will fire many times in rapid 
> succession. Maybe the length of the feedback loop sets the bursting speed.

 Bursting speed ? I was under the assumption that a typical neuron
operated at its max "frequency" when bursting. If this isnt
necessarily the case, then what could be the alleged purpose of
bursting in neural computation ?



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