#sleep-inertia

#sleep-inertia

Humans have a predisposition to experience a drop in alertness and vigilance around midday, between six and eight hours after waking up. In fact, the word siesta comes from the Latin sexta, which in Ancient Rome referred to the sixth hour of the day from dawn; a time reserved for rest and relaxation. There are many markers we measure in the laboratory which indicate that this period is present, even without having eaten lunch, he states.