It’s in fact extremely simple. If we listen to a dull PowerPoint presentation with boring bullet points, a certain part in the brain gets activated. Scientists call this Broca’s area (Region of the brain that contains motor neurons involved in the control of speech) and Wernicke’s area, which is involved in the understanding of written and spoken language. Overall, to some extent, it hits our language processing parts in the brain, where we decode words into meaning. And we can say that’s it, nothing else happens.
And what when we are being told something in an interesting story form: Not only is the language processing part in our brain activated, but it also activates other areas in our brain, that we usually use when experiencing the events of the story. In a way, we link up metaphors and literal happenings automatically. Everything in our brain is looking for the cause and effect relationship of something we’ve previously experienced.