Sticking Out Our Tongue While Concentrating

While I concentrate on driving and getting to the ferry on time, hopefully with my tongue at least in my mouth, here is a tidbit to ponder:

Why do we stick out our tongues when concentrating?

"When you are concentrating on something, you are using the hemisphere of the brain also used for processing motor input. It's also noticeable that some people walk more slowly when they are thinking of something difficult. This is caused by interference from the two activities fighting for the same bit of brain to process them. By biting your lip or sticking your tongue out, you are suspending motor activity and keeping your head rigid, to minimize movement and hence interference."

http://answers.yahoo.com/question/index?qid=1006022114257

I just knew we all needed to know that!