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Hello,

I'm a recent NEURON user. I'm trying to model graded synapse using NMODL. Here is the code.
I'm trying to voltage clamp the presynaptic cell and look at the synaptic current. However, the model isn't working. I used setpointer notation to equal vpre to the presynaptic voltage. If any of you could help me out I'll really appreciate it.

Thanks,

Yamin

vpre is declared in the ASSIGNED block, and made visible to hoc by a POINTER statement in the NEURON block . . . but never used in any expression.

gmax (and the synaptic conductance g) should be >= 0.

Have you checked this mod file with modlunit?

The mod file uses x0 and dx as names for two parameters with voltage units. Is there a reason not to use names that are more suggestive of their meanings, like v0 and kv? (x is most often used to mean anatomical distance or "range", dx to signify a "delta" (small increment) of some distance, whereas k suggests a proportionality or rate).

Thank you so much. It worked as soon as used vpre in the expression.

Yamin