Scientists have named four reasons why people prosypaetsja in the morning tired and irritable. Experts note that it’s important for people to sleep to prevent risk of serious diseases, writes newsyou.info.
The first reason, according to scientists, is the accumulation of adenosine in the blood. During REM sleep the human brain consumes large amounts of adenosine triphosphate, which is the source and carrier of energy in cells. Adenosine suppresses alertness and attentiveness, as well as stimulates sleep, causing the person wakes up tired.
The second reason is co-sleeping or lack thereof. Women who sleep with a man, note the decline in the quality of sleep, but if sleep precedes sex, then she wakes up more refreshed. Men, on the contrary affects the lack of sleep with a woman.
The third reason is late bedtimes. Night of wakefulness will affect the hippocampus, responsible for emotions, memory and attention, which leads to lower learning and memory loss and can also be an early sign of Alzheimer’s disease.
The fourth and last reason, according to scientists, is the lack of sugar. Elevated sugar levels in the blood causes the activity of neurons responsible for sleep. For the same reasons, after a heavy lunch makes one sleepy.