24 ms·I don't think we can call electrodes on (in?) a shaved head 'non-invasive'...by chilukrn 7y agoI don't think we can call electrodes on (in?) a shaved head 'non-invasive'...cat199 7y agoit is 'on'. And so, yes, we can: https://en.wikipedia.org/wiki/Non-invasive_procedure https://en.wikipedia.org/wiki/Non-invasive_procedurechefandy 7y agoWell, since I don't consider getting a haircut or shaving to be a surgical procedure, I'd disagree.