openCARP - Introduction to ionic models
Channel: openCARP
Date: 2020-03-05

This video tutorial covers the mathematical fundamentals of ion channels and ionic models based on the Hodgkin-Huxley formulations.
For more information visit our website https://www.opencarp.org

A few hints & corrections:
2:47 - The expression phi_i - phi_e is correct, but the arrow should point in the other direction to reflect that
3:54 - "deviation from the Nernst potential" is more generally described as "driving force".
4:05 - Here the concept of inward and outward currents is also helpful:
outward currents are positive and negatively depolarize the membrane and inward currents are negative and positively depolarize the membrane, therefore I_stim has to be negative.
In openCARP it is already implemented as a negative current (-I_stim), thus a positive current can be used to initiate an AP.