Today’s NYT report on the Havana Syndrome, here. Interestingly (and probably not related), clinical neuroscience researchers are exploring the use of focused ultrasound for enhancing drug delivery produced by opening of the blood brain barrier. In the former case, the suspicion is on microwaves (radio frequency). The clinical work is using sound waves that, name not withstanding, are much lower in frequency.
I’ve thought for sometime that it might be possible to use resonant radiation to modulate the firing frequency of specific sets of neurons from outside the brain since this type of physiology is inherently both electric and chemical.
Discoverers and Discoveries 