What is the correct value of Neuronal Resting Potential - is it -65mV or -70mV? Some books show the resting potential of neurons as **-65mV** , such as _Neuroscience: Exploring the Brain_ , Fourth Edition (2016, published by Wolters Kluwer). ![Graph from page 84, showing the resting potential at -65]( However, a majority of internet sites, including Wikipedia, show the resting potential as **-70mV**. **Which one of these is the correct value, and why is there this small difference**?

Neither is incorrect. Neuronal resting potential is a function of the internal and external concentrations of ions and the conductance of the membrane to those ions via ion channels. Different neurons exhibit a range of resting potentials.

You can calculate the resting potential for a given cell using the Goldman Equation.