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.
おバカな歌でひっくり返って笑っていた うちの親の場合みたいに 自分では意図せずに どうしようもなく出てしまう笑いは より礼儀正しくて社会的な笑い― つまり馬鹿笑いではなく コミュニケーション行動 つまり 対人交流の一環で 意図的に行われる笑いとは 神経生物学的基盤が 異なる可能性があります