By Joann Pan
You can function just fine on 6 hours of sleep a night…or so you think. Here’s how to tell if you’re secretly sleep-deprived.
By Corrie Pikul
1. You’re clicking your pen and tapping your feet.
What’s happening: When you move your muscles, you cue your brain to stay alert, says Hans P.A. Van Dongen, PhD, assistant director of the Like Us On Facebook | Follow Us On Twitter
Read more here:: Huffintonpost