I had an overnight sleep apnea test 3 years ago. They attach a bunch of wires to various places on your head and body to see how your brain reacts while you sleep. It's good, because it actually monitors everything and takes in to account that you aren't sleeping as well in the hospital bed as you would in your own home. It also keeps video on how you sleep to see if you have restless leg syndrome or something like that.

They discovered that I "woke up" every 65 seconds or something like that.. I think it was over 360 "waking episodes" I think they called it in a 7hr45min sleep. I had surgery 2 years ago to remove my tonsils and the hangey-ball at the back of my throat because I did not want to wear a machine to sleep at night, and it's made a huge difference for me!