provigilonline's blog

The day night cycle actually determines the freshness of the individual. It will help the person to brain freshness.  The day night cycle is inside the body. This is biological clock wherein the brain sends the positive signals to the body.  The natural light is the source of energy which will help is normal brain body functioning. Our body follows the day-night cycle by registering light through the eyes. This daily rhythm is called the circadian rhythm. Once this rhythm gets disturbed then there are the chances of getting the feeling of sleepiness.