Just spitballing here-
We have these magnet sensitive cells/structures in the brain, apparently in the pineal.
If heavy metals get in, excited by external stimuli or not, do they disrupt our natural unconscious ability to orient ourselves in the world?
If this function is disrupted, does it make people lethargic or foggy brained or disinterested, zombie-like?
Maybe even just straight up freeze up, ala McConnell and others?
Like a Faraday cage, keeping the pineal from sensing magnetic/electromagnetic fields that are essential.
And/or like an offending signal swamping out/noising up our natural reception.
A Magnetic Remote Control That Can Rewind a Worm's Wriggle
Researchers use heated magnetic nanoparticles to manipulate nerve cells and control simple behavior in nematodes
By Ferris Jabr on July 19, 2010
https://www.scientificamerican.com/article/magnetic-control-worms/