Search found 220 matches

by Raj
Thu Jul 31, 2008 7:19 pm
Forum: Modeling networks
Topic: NetCon.weight [i]
Replies: 5
Views: 3252

Re: NetCon.weight [i]

Printing the NetCon.syns was illuminating. Some of my NetCons contained other targets than expected. I supppose this is a blessing in disguise because it clearly showed the difference between what I thought my code was doing and what it actually did.

Thanks!
by Raj
Wed Jul 30, 2008 11:45 am
Forum: The GUI
Topic: Name of object references
Replies: 2
Views: 2512

Re: Name of object references

Dear Michael,

That is not quite what I want. I think I would like to get my hands on the first name printed by the StringFunctions references method, which seems to be the name of the references in which the list was first stored in the global namespace.

Regards,
Ronald
by Raj
Wed Jul 30, 2008 11:26 am
Forum: Modeling networks
Topic: NetCon.weight [i]
Replies: 5
Views: 3252

NetCon.weight [i]

According to the NetCon documentation http://www.neuron.yale.edu/neuron/static/docs/help/neuron/neuron/classes/netcon.html it should be possible to use a construction in hoc like: w = netcon.weight netcon.weight = w i=1 x = netcon.weight[i] netcon.weight[i] = x Where, as I understand it, for values ...
by Raj
Fri Jul 25, 2008 5:57 am
Forum: The GUI
Topic: Name of object references
Replies: 2
Views: 2512

Name of object references

I have a GUI-element which uses an object passed as an argument during creation. I would like to be able to store the window in a session file, including the name of the objref passed when creating it. My code is something like this: begintemplate myGUI objref myObject proc init{ myObject =$o1 } // ...
by Raj
Fri Jun 06, 2008 6:19 pm
Forum: Other questions
Topic: section arrays in templates
Replies: 1
Views: 1612

Try begintemplate aT create d1 proc many(){ create d1[20] } endtemplate aT The information inside the functions is ignored when allocating space for an object of the class defined by the template, so you need to indicate outside a function but within the template that space for d1 should be allocated.
by Raj
Thu Jun 05, 2008 7:08 pm
Forum: Getting started
Topic: explaination of code creating dendritic spines
Replies: 4
Views: 3342

for(x) a=a+area(x) This bit of code iterates over all segments in the current section and adds up the contribution from each segment to calculate the area as specified by the pyramidal cell reconstruction. F = (L*spine_area*spine_dens + a)/a Calculate with which factor the area needs to be increase...
by Raj
Thu Apr 24, 2008 5:41 am
Forum: MSWin
Topic: Development Enviroments for Windows
Replies: 4
Views: 10149

This topic introduces several editors https://www.neuron.yale.edu/phpBB2/viewtopic.php?t=148 for windows to my knowledge PSPad is still the best freesoftware for working with NEURON's hoc-code. The hoc syntax highlighting comes automatically with the latest versions of the program. The syntax highli...
by Raj
Tue Mar 25, 2008 6:43 pm
Forum: Adding new mechanisms and functions to NEURON
Topic: Netcon Weight
Replies: 5
Views: 3900

with W values such as W=0.1 and W=1 the cell goes from one state of insensitivity to other one of apparent Hyper excitability, but not linearly as it was my initial hypotheses To see the linear behavior you will have to keep the cell in voltage clamp, away from the reversal potential of the synapse...
by Raj
Thu Feb 14, 2008 5:44 pm
Forum: Other questions
Topic: Testing a Range of values
Replies: 1
Views: 2063

by Raj
Sun Jan 06, 2008 3:32 pm
Forum: Getting started
Topic: Can NEURON be used for analysing Calcuim imaging?
Replies: 2
Views: 2542

Abring, Do you want to make a model network or "merely" analyze data from an experiment? In the latter case octave, matlab or python are better choices for doing your work and you will probably need a good image processing toolbox. In the first case it depends on how much detail you want to model th...
by Raj
Sun Jan 06, 2008 11:09 am
Forum: Adding new mechanisms and functions to NEURON
Topic: NMODL mechanism using two USEION statements
Replies: 2
Views: 2348

Does it compile?
If not what are the error messages?
by Raj
Thu Aug 16, 2007 6:39 pm
Forum: Specific models
Topic: Izhikevich Model
Replies: 9
Views: 16544

The ModelDB decision tree looks like a good guide line, and fits my gutfeeling that the code I have available is suitable for personal communication only.

Anyway I believe the changes I indicated are sufficient to change Bill's implementation into an artificial cell.
by Raj
Thu Aug 16, 2007 3:56 am
Forum: Specific models
Topic: Izhikevich Model
Replies: 9
Views: 16544

Well if that is helpfull I have an implementation, but it also includes clamp currents and Tsodyks plasticity model (adapted from Ted's implementation tmgsyn) and the only documentation is given in comments in the file, so it is not fully transparent and I am hesitant to put it on the website. If yo...
by Raj
Wed Aug 15, 2007 4:58 am
Forum: Specific models
Topic: Izhikevich Model
Replies: 9
Views: 16544

The implementation of Izhikevich's model in ModelDB is using the NetReceive block for resetting the model after a spike. Because no flag is used to indicate a self event every other mechanism that connects to it will also reset the model. As a result the model as given on ModelDB http://senselab.med...
by Raj
Mon Jul 23, 2007 5:14 am
Forum: Adding new mechanisms and functions to NEURON
Topic: multi-compartment artificial integrate and fire cells
Replies: 11
Views: 7086

Ted,

There is a nice example why you might want to do this available on ModelDB:
http://senselab.med.yale.edu/modeldb/Sh ... odel=20212

Stating that certain CA1 pyramidal cells can be replaced by a two layer network.

Raj