Page 1 of 1

Simple Question: about parameter cm

Posted: Tue Jun 26, 2007 10:38 am
by shrbert724
in the neuron text that I have, cm is listed as having units of uf/cm^2.

Questions:
Is cm actually in default units of uF/(cm^2)?
Is cm always this or will neuron automatically change it depending on other unit specifications?
Is there any way to change the units of cm in the hoc file, do I just need to make a UNITS{} section with the unit declaration I'm looking for?

Thank you for your time!

Re: Simple Question: about parameter cm

Posted: Tue Jun 26, 2007 11:54 am
by ted
shrbert724 wrote:Is cm actually in default units of uF/(cm^2)?
Yes.
Is cm always this
Yes.
Is there any way to change the units of cm in the hoc file
No.

Why do you ask? Are you trying to replicate a model that specified total
membrane capacitance?

Posted: Tue Jun 26, 2007 11:59 am
by shrbert724
We are replicating a model that has capacitance at 100 microfarads per cm2 which is far out of range of typical neurons. More questions may come, but I just wanted to verify that is the default parameter for cm.

Posted: Wed Jun 27, 2007 2:15 am
by ted
shrbert724 wrote:We are replicating a model that has capacitance at 100 microfarads per cm2
So there is a problem with the numerical value of the parameter, not its
units.