They
become like a self - stimulating rat, pressing a bar to deliver electricity to its brain's ventral
tegmental area, which stimulates its nucleus accumbens to release dopamine, which feels... ever so good.
Mobbs saw that subjects» brains
became highly activated for all the cartoons, but one subset of structures responded solely for the funny ones — namely, the ventral
tegmental area, the nucleus accumbens, and the amygdala.