Sleep forms part of humans biological need to rest. As a person sleeps, the various physiological processes of a human body figuratively put into an apparent arrest and some parts of our system that were mostly exploited can be replenished for future use.
However, imagine a system so disrupted that our normal scheduling for sleeping and waking is totally altered. Some people tend to sleep early and wake up early in the morning and some cannot sleep early and as a consequence, wakes up late.
These and other sleep-related problems are manifestations of a malfunctioning biological circadian clock and characterize several forms of Circadian Rhythm Syndrome. Circadian activity is a unique by 24-hour period or cycles in which our body is physically patterned.
24-hour vs. 25-hour cycle
Earth rotates around the sun in a 24-hour cycle, so as our body functions in this 24-hour time schedule. All living organisms charismatically subscribe to this cyclic resting and activity patterns so that their body could function in sync with the environment in which they live.
Although humans externally operate under a 24-hour environment, research found that...
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