Open Question: Do Japanese people become mute after trauma?

In Japanese books, movies, an entertainment, it’s quite common for the characters to stop talking, or become mute after an emotional trauma. I was wondering if this actually happens. Like if culturally, Japanese people have the mindset that that is what happens after a trauma, and their brains follow suit an that is how they express the trauma that happened to them. Like how Americans who experience sleep paralysis believe they are being abducted by aliens, while Japanese people believe they are being held down by a girl with long black hair. Or how people who believe they will die in surgeries, often do, even if it was only a minor surgery. Or how native american tribes often would have a vision from their spirit guide because they had been encultured to believe it would happen, while they fasted an cut themselves in the wilderness.
Also do you know any other interesting examples? I know South Korean people believe sleeping with a fan on will suffocate you, an Japanese people believe that getting wet in the rain will give you a cold. But I don’t know if their minds make it true.
I was wondering if it was a myth, or was on of those “mind phenomenons” :-}
Wow JOe D, are you fer real? Do you have any links so I can learn more :-}
gaijin: Yeah the depression an suicide is really terrible :-{ I hope something is done about that. I wonder if becoming mute has to do with the unique kinds of pressure on individuals in Japanese culture.