Sleep

Sleep is the regular state of natural unconsciousness observed in all mammals, birds and fish. It is heavily influenced by circadian rhythms, and by hormonal and environmental factors as well. Sleep appears to perform a restorative function for the brain and body, as evidenced by the myriad symptoms that result when an individual is deprived of sleep. Its function in health and in disease is being increasingly studied in specialized sleep laboratories throughout the world.

Related Topics:
Unconsciousness - Mammal - Bird - Fish - Circadian rhythm

~ ~ ~ ~ ~ ~ ~ ~ ~ ~