It is physics, but everything's physics until you get to levels we just don't currently understand as physics, like psychology.
Physiology is physics, psychology is ... idk ... probably still physics, but we don't have a physical model for psychology and AFAIK, there isn't one on any horizon.

This is physiology, and so it's physics.

Basically all I can make out is something like,
The old model was to treat neurons like an electrical cable, but the numbers just don't add up, so the model is bad.
Ditch it.
Here's a new model that seems better.