Brain scans, specifically fMRIs, can provide a ton of information in individuals. Past research has indicated that there profoundly gifted individuals are "neuro-divergent." Specifically, it has been said that gifted individuals may have a thicker cerebral cortex and more complex synapses within their brain. I explain more about this here:
https://resources.njgifted.org/purely-gifted/are-gifted-minds-wired-differently Every individual is neurologically "wired" a little differently, but the difference between one profoundly gifted individual and another may be even greater than the difference between two average individuals; however, there will still be some similarities -- such as more widespread neural activity when completing certain tasks or processing information.
Other recent research suggests that it may be possible to detect certain things, such as Autism, using blood tests.
