So it seems possible that the neurobiology for helpless, involuntary laughter, like my parents lying on the floor screaming about a silly song, might have a different basis to it than some of that more polite social laughter that you encounter, which isn't horrible laughter, but it's behavior somebody is doing as part of their communicative act to you, part of their interaction with you; they are choosing to do this.
Seega paistab, et selle spontaanse naeru neurobioloogiline taust, mis mu vanemaid seda napakat laulu kuuldes põrandal tabas võib olla sootuks erinev kui sellisel viisakamal naerul mida me kasutame suhtlemisel ja mis ei ole nii ülevoolav, see pole tingimata tehtud naer, aga kasutame seda lihtsalt suhtlusvahendina, rakendame seda teadlikult.