No, not really.

The electric fields produced by tDCS aren't strong enough to force neurons to fire, even in brain areas very close to the surface/electrode, though they can adjust the timing of neural activity, so that cells fire slightly sooner/later than they might otherwise. My collaborators and I have collected some nice data from awake, behaving monkeys (which have obvious similarities to humans) demonstrating this.

- DC + behavior: http://packlab.mcgill.ca/Krause%20et%20al%202017.pdf - AC + deeper structures: http://packlab.mcgill.ca/Krause%20et%20al%202019.pdf

There's also a recent preprint replicating our AC results: https://www.biorxiv.org/content/biorxiv/early/2019/07/09/696...

Thanks for the sources!

No problem--that's the last few years of my life, so if got any questions, I'd be happy to see if I can answer them.

Perhaps if it was poorly managed, scoped out, and they blasted the brain with unhealthy amperage of course. In my experience getting full brain scans frequently helps the doctors understand what the brain needs and tDCS supplements the brain.