CNN New Day June 10, 2014 10:44:00
Brain, let's you sense what you're seeing and react shut down first. like your brain decides on i'm tired and had enough and shut it down. truckers they found would see, for example, traffic obstruction and literally the brains wouldn't register it so it was worse in some cases than being drunk. >> that is frightening. you drive along on the highways we' aware of the massive trucks out there. they have to be out there but talking about the wake in this particular accident but how widespread is this issue of sleep deprivation? >> it's terribly widespread. americans, more than 35% of americans h...