When I was doing my PhD research in the 1980's I wanted to see how a dog's brain responded to different types of sounds before and after training. This was in the 1980's, and the only method available for animals was to do Evoked Potential tests, in which simple, tiny electrical sensors were glued to the scalp. This allowed one to measure activity in the brain in an extremely general way: What kind of brain waves does one see in the Temporal versus the Parietal lobe, for example, after hearing or seeing specific stimuli?Evoked Potential tests are logistically easy to do on adults: You shave tiny areas of the scalp, glue on the sensors, and ask the subject to stay still for a set period of time. The research subject mustn't move, because muscles move through electrical stimulation in Read More