well how about brain scanning newly born children? that might reveal something, if nural networks physically develop over time wouldn't it?
we can compare the different complexity of the brain structure of that newly born kid (control) vs another newly born one subjected to harsh pain ( Experiment ) and see which regions and what structural changes are observed. it isnt ethical but hey, in the name of science what not has been done already XD
I wouldn't personally do it. maybe alter the pain part to something else. maybe keep the kid hungry ? cant try the happy route cause who knows what would make a baby happy., we are so artificial anyway :P
haha