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It is possible to have Axo-Axonic & Dendro-Dendritic syn

Posted: Tue Jul 19, 2005 12:53 am
by aluri
Is it possible to model any synapse other than a Axo-Dendritic synapse using Neuron?

I want to model certain basic circuits like those described in Gordon Shepherd's 'Synaptic Organization of the Brain' some of which contained Axo-Axonic synapses and even other kinds of synapses like dendro-dendritic types.

Non axo-dendritic synapses

Posted: Tue Jul 19, 2005 4:59 am
by Raj
In NEURON the axon or soma section has no special status. It should therefore not pose any problems to make synaptic signals from dendrites to axons.

Including the following code (with obvious replacements to conform to your own code) should do the trick (dendro-axonic connection):

In the target cell:

Code: Select all

template TargetCell
public MySynapse
create MySoma
objref MySynapse
MySoma MySynapse = new ExpSyn(.5)

endtemplate TargetCell
In the source cell:

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template SourceCell
public MyDend
create MyDend 
endtemplate SourceCell
and the code for generating the network:

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objref Target, Source, MyNetCon
Target = new TargetCell(...)
Source= new SourceCell(...)

Source.MyDend MyNetCon = new NetCon(&v(.5), Target.MySynapse)
don't forget to indicate which variables in the templates are public, without that you won't be able to access them in the code for building your network.

Thanks Raj

Posted: Tue Jul 19, 2005 1:06 pm
by aluri
Thanks Raj.

I was able to implement it.