The word biorhythm is a compound of two Greek words, bios and rhythmos, which mean life and a constant or periodic beat. The theory of biorhythms defines and measures three basic and important life cycles in man: the physical, emotional, and intellectual. -wikipedia
Consciousness is the awareness or perception of something by a person.
Biorhythms define and measure three basic and important life cycles in man: the physical, emotional, and intellectual.
Circadian Rhythms are physical, mental and behavioral changes that follow a roughly 24-hour cycle, responding primarily to light and darkness in an organism's environment.
In animals melatonin is a hormone that anticipates the daily onset of darkness; this often helps to allow an organism to fall asleep.
Seasonal Affective Disorder
Seasonal Affective Disorder is a type of depression that's related to changes in seasons and it begins and ends at about the same times every year.
Circadian Rhythm and Your Brain's Clock
3 additional facts
- Circadian rhythms have been known to man since the 4th century BC when the Androsthenes a ships captain serving Alexander the Great described the leaves changing on a tree matching the light cycles in 24 hours.
- Airline pilots often stay awake for long periods of time and can fly routes that prevent them from ever encountering darkness for weeks at a time. This causes fatigue and has contributed to many accidents over the years.
- Prescription and other hard drug abuse has been credited with the interruption of the circadian cycle in some people. This causes fatigue and an inability to sleep pushing people back towards chemical dependency in many cases.