"This sudden head jerk is how people commonly know they’ve had a micro-sleep as the brain doesn’t remember such short naps. "Sleep has to last beyond a minute or two for your brain to remember it," says Prof Horne, who studied driver tiredness for 10 years. "With micro-sleep, you are just left with a feeling of not knowing if you are coming or going.""
Shocking news story! I had no idea that micro-sleep was caused by fatigue or that the best way of tackling it is the practical advice to "safely park then have a drink containing about 150mg of caffeine. It will not kick in for 20 minutes, so have a 15-minute nap and then freshen up for five minutes before continuing your journey."