Concentration
Question: People doing a tricky job will stick their tongue out and clamp it
between their lips. Why? Does this happen in all cultures?
Answer: When you need to concentrate on something, say a word problem, you
are using the hemisphere of the brain also used for processing motor input. It
is amusing to see people slow down when they are thinking of something difficult
while walking. This is caused by interference from the two activities fighting
for the same bit of brain to process them. I suppose by biting your lip or
sticking your tongue out, you are…
