Enforced Longer Cycles
Studies by Nathaniel Kleitman in 1938 and by Derk-Jan Dijk and Charles Czeisler in 1994/5 have put human subjects on enforced 28-hour sleep–wake cycles, in constant dim light and with other time cues suppressed, for over a month. Because normal people cannot entrain to a 28-hour day in dim light if at all, this is referred to as a forced desynchrony protocol. Sleep and wake episodes are uncoupled from the endogenous circadian period of about 24.18 hours and researchers are allowed to assess the effects of circadian phase on aspects of sleep and wakefulness including sleep latency and other functions.
Read more about this topic: Circadian Rhythm
Famous quotes containing the words enforced longer, enforced, longer and/or cycles:
“Every constitution..., and every law, naturally expires at the end of 19 years [a generation]. If it be enforced longer, it is an act of force, and not of right.”
—Thomas Jefferson (1743–1826)
“Every constitution..., and every law, naturally expires at the end of 19 years [a generation]. If it be enforced longer, it is an act of force, and not of right.”
—Thomas Jefferson (1743–1826)
“Men are much more unwilling to have their weaknesses and their imperfections known, than their crimes; and, if you hint to a man that you think him silly, ignorant or even ill-bred or awkward, he will hate you more and longer than it you tell him plainly that you think him a rogue.”
—Philip Dormer Stanhope, 4th Earl Chesterfield (1694–1773)
“The stars which shone over Babylon and the stable in Bethlehem still shine as brightly over the Empire State Building and your front yard today. They perform their cycles with the same mathematical precision, and they will continue to affect each thing on earth, including man, as long as the earth exists.”
—Linda Goodman (b. 1929)