IUBio

Axon collaterals ?

Matthew Kirkcaldie Matthew.Kirkcaldie at removethis.newcastle.edu.au
Tue Dec 16 20:54:41 EST 2003


In article <d9ydnfbgF_MmLkKiU-KYhA at giganews.com>,
 "Mark Zarella" <zarellam at twcnyremove.rr.comspam> wrote:

> Depends entirely on the type of synapse it forms.
> 
> So what kind DO they form?

The same kind as the other synapses from that axon: glutamatergic in the 
case of 80% of cortical neurons, GABAergic in the case of the remainder 
(loosely speaking).  The former is excitatory and would cause the neuron 
to experience positive feedback to some extent; the latter are 
inhibitory and would cause some degree of negatiive feedback.

For the GABAergic neurons the picture is complicated by electrotonic 
connections between large numbers of these cells, which act in a 
frequency-dependent, weakly excitatory fashion.

      Cheers,

         Matthew.



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