What is melatonin? Melatonin is a hormone produced by the pineal gland and has an important role in circadian rhythms. The daily rhythm of melatonin secretion is controlled by an inbuilt, free running pacemaker, the suprachiasmatic nucleus, and is synthesized from the amino acid tryptophan. Melatonin synthesis is controlled by exposure to cycles of light [...]
What is sleep? Everyone knows what sleep, but most people would find it difficult to define. Sleep is the intermediate state wakefulness and death, wakefulness being regarded as the active state of all the animal and intellectual functions, and death as that of their total suspension. During sleep, our senses are disengaged and we are [...]
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