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.
Parece posible que la neurobiología de la risa involuntaria e inevitable, como la de mis padres en el suelo riendo por una canción tonta, podría tener una base distinta que la risa social más educada que encontramos, y no es una risa horrible, sino que responde al comportamiento de alguien que se comunica con uno, es parte de su interacción con uno; eligen hacer eso.