I compute the voltage travelling through a long sequence of RC circuits in order to approximate the signal travelling through the axon of a neuron. This is an example of how physical models are used to replicate the brain of mammals.
I you haven't seen it, you would benefit from watching my video on the SIR disease model ( • Implementing a SIR Disease Model in Python... .
Check out CINPLA at
https://www.mn.uio.no/ibv/english/res...
The Human Brain project: https://www.humanbrainproject.eu/
Check out the code here: https://github.com/gregwinther/youtube