I think electrical activity in the brain is misunderstood. These electrical signals are not electrons moving along a wire, they are waves of depolarisation betw

I think electrical activity in the brain is misunderstood. These electrical signals are not electrons moving along a wire, they are waves of depolarisation between the inside and inside of the cell membrane travelling along the axon or dendrites. The depolarisation is due to the activity of a bunch of ion pumps and channels that let ions pass between the inside and outside of the cell. Some of these ion channels are themselves voltage-gated, thereby further increasing the depolarisation in response to depolarisation, and propagating the signal that way. So it's still mostly atoms moving in and out of cells. Still stardust.