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Hi everyone,

I would like to know what is the main difference between NEURON xtra mechanism and LFPy (https://lfpy.github.io) in the calculation of extracellular potential in a particular spatial location (x,y,z) ?

Thank you very much

Luciana.

Thank you very much Ted. I will send you the hoc,mod and ses files to your e-mail.

Hi everyone, I have another question related to Vext in extracellular mechanism. I want to adjust the amplitude of the extracellular action potential simulated to our experimental data. I thought for that purpose I should change xg parameter (conductivity in extracellular layer) and the waveform of ...

Oh, I forgot answer your other question.

ted wrote: Before discussing the effects of changing soma diameter, let me ask one question: what were the values of nseg in your model?

nseg = 1 for both compartments (soma and axon).

I'm sorry my english is not very good. Let's start again. What happens if you make soma.diam even larger? Does the range of stimulus amplitudes that make the axon fire first become wider or narrower? When I increase the diameter of the soma (soma.diam), the range of stimulus amplitudes that make the...

What happens if you make soma.diam even larger? Does the range of stimulus amplitudes that make the axon fire first become wider or narrower Ted, if soma.diam become even larger, I can't find any stimulus amplitude that make the axon fire first. I pass from soma firing first to none fire state. How...

What happens to the soma+axon model if you reduce the stimulus current amplitude? The time between the stimulus and the action potential is bigger with lower current amplitudes. In some point the current in not suffiecient to generate the action potential. amplitud = 0.1 nA, soma and axon both fire...

Dear Ted, I modeled this simple example that you proposed. Imagine a cell with a spherical soma. A dendrite is attached to one side of the soma, and an axon is attached to the other side. The geometry of the cell is: soma L = diam = 10 um dend L = 500 um, diam = 2 um axon L = 500 um, diam = 1 um Ra ...

Hi Ted!
Thanks for your answer. What you say, make me sense.
But, I have figured out it this way:
In the shell script: Ah! and thank you for the reference,
Luciana.

Thank you Ted! Idraw seems work nice for me! I will use it. When I have to mix NEURON's figures with python's plots, I will save the NEURON's figures using: Window/Print & File Window Manager, Print/PostScript and then open them with Illustrator and make the merge with Python's plots (.pdf, .jpg...

Hello, I have wrote a shell script that calls NEURON many times, each time with a different argument that makes NEURON load a different c*.hoc file. Inside the loop (in the batch file) I have: nrngui -c "zzz=$file" test.hoc and like Ted wrote above, the hoc program create a file name that ...

Hi! I want to print several graphs and until now I have used idraw for merging the figures and then print them. I have done this clicking Window/Print & File Window Manager, make the selection and then Print/Idraw then I open the file writing >idraw filename and clicking on File/Import Graphic.....

Hello! I imported a neurolucida file (.asc) to NEURON. The dendritic tree was pooled into 56 sections, but I would prefer more sections containing less vectors (hopefully around 100) in order to be able to discriminate within branches. More specifically, I would like to insert different conductances...

It works!!! installing XQuartz 2.7.5 the message desappears and NEURON run perfectly.
Thank you very much I'm so happy

I have removed the NEURON application and installed it again (the same one). And appears something new!: -e dyld: Library not loaded: /opt/X11/lib/libX11.6.dylib Referenced from: /Applications/NEURON-7.3/nrn/x86_64/bin/nrniv Reason: image not found ./nrngui.sh: line 25: 1312 Trace/BPT trap: 5 ${NRNG...