Lack of Sleep
Sleep is a major factor in your mood. If you are sleep deprived you could become more irritable, angry, more prone to stress, and less energized throughout the day. "Studies have shown that even partial sleep deprivation has a significant effect on mood. University of Pennsylvania researchers found that subjects who were limited to only 4.5 hours of sleep a night for one week reported feeling more stressed, angry, sad, and mentally exhausted. When the subjects resumed normal sleep, they reported a dramatic improvement in mood."
Read more about this topic: Mood (psychology)
Famous quotes containing the words lack of, lack and/or sleep:
“If a hermit lives in a state of ecstasy, his lack of comfort becomes the height of comfort. He must relinquish it.”
—Jean Cocteau (1889–1963)
“The hypothesis I wish to advance is that ... the language of morality is in ... grave disorder.... What we possess, if this is true, are the fragments of a conceptual scheme, parts of which now lack those contexts from which their significance derived. We possess indeed simulacra of morality, we continue to use many of the key expressions. But we have—very largely if not entirely—lost our comprehension, both theoretical and practical, of morality.”
—Alasdair Chalmers MacIntyre (b. 1929)
“A solitary traveller can sleep from state to state, from day to night, from day to day, in the long womb of its controlled interior. It is the cradle that never stops rocking after the lullaby is over. It is the biggest sleeping tablet in the world, and no one need ever swallow the pill, for it swallows them.”
—Lisa St. Aubin de Terán (b. 1953)