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.
Det er muligt at neurobiologien for  hjælpeløs ufrivillig latter, som mine forældre der lå og skreg af latter over en fjollet sang, nok har en anderledes baggrund end den mere høflige sociale latter som vi møder, der ikke er en forfærdelig latter, men det er en opførsel en person gør, som en del af kommunikativ relation, en del af deres interaktion med dig; de vælger at gøre det.