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.
Joten vaikuttaisi, että neurobiologia sellaisessa tahattomassa naurussa, jota vanhempanikin lattialla nauroivat huutaessaan höpölaululle, saattaa olla perustaltaan erilaista kuin osa kohteliaasta, sosiaalisesta naurusta, johon törmää, mikä ei ole suurta hekotusta, vaan pikemminkin kommunikatiivinen akti, jonka joku tekee osana vuorovaikutustaan kanssanne: he tekevät sen tietoisesti.