If a simple coil is able to do this to the brain, how come the many Teslas of a superconducting MRI magnet don't do zip? Genuinely interested...
MRI machines also use much smaller modulated magnetic fields during a scan. It's conceivable these could have TMS like effects but as far as I know they don't in practice. I imagine TMS uses fields which are stronger than these since I believe the excitation coils are placed in very close proximity to the head.