What you see in the regions in blue, which lies in auditory cortex, are the brain areas that respond more to the real laughs, and what seems to be the case, when you hear somebody laughing involuntarily, you hear sounds you would never hear in any other context.
你看到的蓝色区域里，是听觉皮层， 这是大脑内对真笑做出更多反应的区域， 并且看起来似乎… 当你听到有人不由自主地发笑时， 你会听到你在别的环境中从未听过的声音。