"The problem for me became very severe and my head nurse actually called me into her office to discuss it... it had gotten to the point where I was so chronically sleep-deprived that I was falling asleep while I was trying to report off to the on-coming shift. So, I'm sitting there talking about very complicated medical issues, and in the middle of a sentence, I would nod-off. And as you can imagine, the person I'm speaking to would be very upset that I’m so distracted and unfocused..."

Quote from an interview with a night shift nurse.

Sleep deprivation impairs your performance.8

Slowing of mental processes involved in attention, memory, producing and understanding language, learning, reasoning, problem solving, decision making.