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The role of darkness in sleep.

Published : 2019-01-01 20:44:48
Categories : Councils to sleep well Rss feed



The role of darkness in sleep.

Darkness a primordial element of our sleep



Natural or artificial, light, which allows us to see or distinguish objects and other forms, usually comes from many sources. Natural light is mainly diffused by the sun, the stars and other stars. Of course, the one scattered by the sun is the strongest of natural lights. She is the light of day.


Artificial light, it is produced by multiple sources such as electric lamps, projectors, vehicle headlights etc ... Less effective than that of the day, this light is used to overcome the lack of light. It can thus be used to illuminate the outside during the night, the rooms of a dwelling etc …


In the natural order of creation, day and night are signals that allow our biological clock to have a fairly precise and regular operating rhythm. Our functions, both biological and behavioral, are thus subject to this particular rhythm which constitutes our circadian rhythm. The alternation between day and night synchronizes in our brain, which regulates our biological clock and governs our sleep cycle.


Thus, the day and the night allow our clock to regulate our phases of awakening, and of sleep. Sunlight energizes and drives us to action, while the darkness of night drives us to sleep and inaction.


As an important part of our circadian rhythm, sleep is of paramount importance to our health and well-being. Respecting our sleep cycle is necessary for the regeneration of our cells. Indeed, during the night, our body works in slow motion. An overall slowdown that concerns among other things breathing, muscular and arterial tension, heart rate ... in short, an overall slowdown in our metabolism.


The body uses our sleep to produce new cells and replace dead cells.

Having a well-established sleep routine ensures better physical and mental health.


Sleep is a very complex process where many elements play a specific role. And among these elements, the most important is melatonin, otherwise called sleep hormone. Hormone essential for a quality sleep, melatonin reacts to the light. It is thus secreted only during the night. Thus, when the eyes transmit to the brain the information that darkness has finally substituted for light, our brain secretes this specific hormone.

Melatonin is naturally produced by our pineal gland located in the brain. It allows our body to synchronize our biological clock between day and night. Melatonin and light go hand in hand, which determines the importance of light on our sleep.
Secreted only in the dark, melatonin is usually produced between 10 pm and 7 am. And the direct effect of light on sleep is that it stops this secretion. The effects of light on sleep are important. And as important is the intensity of the light as its color. Indeed, the blue light is energizing and allows, among other features, to stay awake.

Physiological function as important as eating or drinking, sleeping is an essential function, an essential requirement for our physical and mental health. It is therefore essential for us to be able to preserve these extremely important moments. And to better enjoy our sleep, it is important for us to eliminate all sources of disturbance such as noise, light etc ... that could affect the quality of our sleep.



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