Kronobiologi

Opdag hvilken rolle lys spiller på kroppen

Vi har set, at kronobiologi studerer døgnrytmer, og at vekslen mellem dag/nat er en af de vigtigste synkronisatorer af vores biologiske ur. Når natten falder på, markerer faldet i lyset starten på søvnfasen, og kroppen (gennem den superkiasmatiske kerne) begynder at udskille melatonin, hvilket inviterer os til at sove. På den anden side, når dagen bryder på, markerer stigningen i lys starten på den vågne fase. Kroppen stopper udskillelsen af melatonin og aktiverer udskillelsen af de vågne hormoner (kortisol, serotonin).

Ud over dets regulerende effekt på vores biologiske rytmer er det nu bevist, at lys ligeså har en fysiologisk effekt på kroppen . En nylig undersøgelse har faktisk bevist, at lys, hvis det leveres i tilstrækkelig intensitet og kvalitet, forbedrer humøret og øger kognitive præstationer såsom hukommelse, årvågenhed, reaktivitet, intellektuelle evner osv.

The Science of Light

Understanding the science behind light is essential for grasping its influence on our physiology. Light is a form of electromagnetic radiation that travels in waves, each with a different wavelength and energy level.

What is Light?

At its core, light consists of photons, which are particles of energy. These photons travel in waves and can vary in length. The human eye detects only a small portion of the entire electromagnetic spectrum—what we know as visible light, which ranges from approximately 380 to 700 nanometers in wavelength. This visible light is responsible for the colors we see and is crucial in regulating various biological processes.

Different Types of Light

Light can be categorized into several types based on wavelength, each affecting the body differently. Natural sunlight is the most balanced source of light, containing a mixture of ultraviolet (UV), visible, and infrared light. Each type of light plays a unique role; for instance, UV light is vital for vitamin D synthesis, while blue light, a component of visible light, is essential for regulating circadian rhythms. Nonetheless, each type can pose risks if there's overexposure, making it critical to balance our light exposure.

The Electromagnetic Spectrum

The electromagnetic spectrum encompasses all types of electromagnetic radiation, from gamma rays with the shortest wavelengths to radio waves with the longest. In terms of health, we are primarily concerned with visible light, UV light, and infrared radiation. Each segment of the spectrum interacts with the body differently, influencing a range of physiological and psychological processes. For instance, while UV light aids in vitamin D production, overexposure can lead to skin damage.

Ultraviolet Light (100–400 nm): Short-wavelength light, invisible to the human eye, that can damage skin and eyes with overexposure.
Visible Light (400–700 nm): The light we see, comprising all colors from violet to red.
Infrared Light (700–1,000 nm): A type of longer-wavelength light, felt as heat, used in therapies to promote relaxation and healing.

Discover what role light plays on the body

with Roland Pec - sleep specialist and chrono-therapist

Luminette gengiver de gavnlige virkninger af solen og stimulerer specifikke receptorer, placeret i øjnene, som aktiverer den energigivende respons, som lyset har på kroppen. Det vil hjælpe dig med at bekæmpe energinedgange, så du kan føle dig mere i form, og det vil have en regulerende effekt på dit søvnmønster.

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