Roger Ebert, on Elevation
or, why movies are more likely to be great in the theater than at home. (Link from The Morning News.)
Studies have indicated that Elevation is triggered by the stimulus of our vagus nerve, described by Wikipedia as the only nerve that starts in the brainstem and extends down below the head, to the neck, chest and abdomen, where it contributes to the innervation of the viscera. It must be involved in what we call “visceral feelings,” defined as “relating to deep inward feelings rather than to the intellect.”
The vagus nerve would certainly account for what I feel, which is as much physical than mental. For years, when asked “how do you know a movie is great?” I’ve had the same reply: I feel a tingling in my spine. People look at me blankly. I explain that I feel an actual physical sensation that does not depend on the abstract quality of the movie, but on–well, my visceral feelings.