research shows why people feel despite a sleepless night, often not at all tired, the brain produces the body's natural stimulant dopamine, which makes them fit.
Whoever beats all night into day, even not in the springs is that often feels the next morning still remarkably fit. Instead of the expected sleepiness, there is often astonishing alertness. A study shows that the body when he got too little sleep, the hormone produces dopamine, a type of body's own stimulants. The effect occurs even after a sleepless night.
Sleepless in research
The scientists believe their study, 15 healthy participants either awake all night or allowed them to sleep in peace. The next morning they examined how the subjects felt tired, as well their visual attention and memory functioning. The
Participants with sleep deprivation exhibited higher dopamine levels in two parts of the brain: the striatum, a part of the cerebrum, the motivation is assigned, and in the thalamus, the largest part of the forebrain. The thalamus is responsible for the attention. At the same time, the researchers found that low dopamine levels associated with Ermattungsgefühlen and affect the ability to absorb and process information.
An endogenous stimulant
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