>Earlier in my career I did some fMRI and, whilst an interesting technique, I've never been convinced that it quite delivers on the claims. Firstly, you aren'

>Earlier in my career I did some fMRI and, whilst an interesting technique, I've never been convinced that it quite delivers on the claims. Firstly, you aren't looking at an electrical signal but rather changes in blood flow which are (reasonably) assumed to be coupled with areas of increased neural activity. This felt to me a bit like trying to debug a computer program by pointing a heat sensitive camera at your motherboard. It's pretty crude but it works. fMRI has been useful for a ton of things, it's even possible to read people's minds with it (from seeing what words they are thinking to an entire video reconstruction.)