Isn't chemistry an 'electron kinda thing'?
Kinda like everything you can see, hear, taste, feel, or smell?
As is most everything on earth. But the EM field they imagine is in addition to the chemistry inside the brain. The active EM field might even extend outside the brain structure somewhat, which is why we wear our foil hats sometimes even at home, to keep outside EM forces from modifying our own EM fields. Ha! You probably thought it was a joke.