Research 1 : Top 10 Mysteries of the Mind

Source:

Top 10 Mysteries of the Mind

http://www.livescience.com/11337-top-10-mysteries-mind.html

My Topic:

Laughing is good for human even when it's a false laugh.

What I hope to learn from this source:
I want to know whether laughing is always good without exception, and the exact effects of laughing(how does it affects?, whys is it good?, which organs does laughing affect?)

Notes:

1. Scientists have found that during a good laugh three parts of the brain light up: A thinking part that helps you get the joke, a movement area that tells your muscles to move, and an emotional region that elicits the "giddy" feeling.
2. "1" → i have to research more how does a good laugh light up those 3 parts. 
3.  But it remains unknown why one person laughs at your brother's foolish jokes while another chuckles while watching a horror movie.
4. ▶Still it is unknown that why each person laughs at different situation. I Should think and research about this further.
5. John Morreall, who is a pioneer of humor research at the College of William and Mary, has found that laughter is a playful response to incongruities — stories that disobey conventional expectations.
6. Others in the humor field point to laughter as a way of signaling to another person that this action is meant "in fun." One thing is clear: Laughter makes us feel better.

Final Thoughts:

Now I knew 3 functions that a good laugh lights up, and the fact that laughter makes us feel better is true. But I can't entirely agree with this because we often face the situations in which we have to laugh even if we don't want to. I think it won't affect positively to human. So I'll research more about this kind of thing to support my arguments.