Search found 7 matches

by WWybo
Tue Jun 25, 2019 6:35 am
Forum: Other questions
Topic: synapse model that reads voltage at other location
Replies: 1
Views: 1424

synapse model that reads voltage at other location

I would like to do something a bit non-standard: I want to implement a synapse model that reads the membrane potential from a compartment other that the one it has been inserted into. Is this possible at all and if so, how would I implement such a mod file?
by WWybo
Wed Aug 01, 2018 4:59 am
Forum: Other questions
Topic: Setting the coupling conductances
Replies: 10
Views: 3287

Re: Setting the coupling conductances

Ah yes, thanks a lot. That is indeed a much simpler solution!

Best regards,
Willem
by WWybo
Tue Jul 31, 2018 11:05 am
Forum: Other questions
Topic: Setting the coupling conductances
Replies: 10
Views: 3287

Re: Setting the coupling conductances

Dear Ted, thanks for the clarification. I think I now managed to figure out an (approximate) way to implement the systems of equations that I need. In the example, taking the limit of r2 -> 0 reduces the system of equations you describe to the system of equations that I need. This can be implemented...
by WWybo
Mon Jul 30, 2018 2:01 pm
Forum: Other questions
Topic: Setting the coupling conductances
Replies: 10
Views: 3287

Re: Setting the coupling conductances

Thanks for the quick reply! I'll explain the problem I'm having in more detail with this example: 3 | 1-o-2-o | 4 So in the reduced model, the system of equations I want to implement would be (leaving out the terms for node 1 for simplicity): c_2 dv_2/dt = - g_L2 v_2 + g_23 (v_3 - v_2) + g_24 (v_4 -...
by WWybo
Mon Jul 30, 2018 11:39 am
Forum: Other questions
Topic: Setting the coupling conductances
Replies: 10
Views: 3287

Re: Setting the coupling conductances

Dear Ted, many thanks for your reply. I actually made a silly mistake and added conductances instead of resistances, the formula in my previous answer should be 1 / g_c = (r_a * L_1/2) / (PI * a_1^2) + (r_a * L_2/2) / (PI * a_2^2). For a simple linear dendrite, I now get the correct results and the ...
by WWybo
Fri Jul 27, 2018 11:07 am
Forum: Other questions
Topic: Setting the coupling conductances
Replies: 10
Views: 3287

Re: Setting the coupling conductances

Hi Ted, thanks a lot for your answer. Does this mean that the effective coupling conductance between two sections in Neuron (with nseg set to 1 for both) is given by g_c = (PI * a_1^2) / (r_a * L_1/2) + (PI * a_2^2) / (r_a * L_2/2) ? Here a_1, a_2 are the radii of both sections, L_1, L_2 their lengt...
by WWybo
Tue Jul 24, 2018 4:56 am
Forum: Other questions
Topic: Setting the coupling conductances
Replies: 10
Views: 3287

Setting the coupling conductances

Dear all, I'm looking for a way to implement simplified compartmental models in Neuron. In short, I would like to set coupling conductances between compartments explicitly, without using an actual geometry and axial resistivity (a compartment here would correspond to a single voltage variable, so I ...