Here's a couple of graphs that may suggest why enabling inhibition in this model prevented all spikes after the first one. In these graphs M_Cell[0].soma.v(0.5) and R_Cell[0].soma.v(0.5) are Vm at the soma of M1 and R2, respectively. First the response when inhibiton was OFF
The appearance of NEURON's graphical windows is controlled by definitions in the file ``$(NEURONHOME)/lib/nrn.defaults`` (under MSWindows it's ``c:\nrnxx\lib\nrn.def`` where ``xx`` is the version number). This is a plain ASCII file that you can edit with a text editor.