What is Importance of Sleep in day to day Life?

Even mild sleep restriction over a few days may be grade cognitive and physical performance, overall productivity, and the health of person.

Sleep causes to major types of physiological effects: first, effects on nervous system and second effects on the other functional systems of body.

The nervous system effects are the more importance.

Lack of sleep certainly does affect the functions of central nervous system.

Prolonged wakefulness is often associated with progressive malfunction, thought process and sometimes even causes abnormal behaviour activities.

We are all familiar with the increases legines of thought that occurs toward the end of prolonged wakefull period, but in addition, a person can become irritable or even psychotic after forceed wakefulness.

Therefore we can assume that sleep in multiple ways restores with both normal levels of brain activity and normal balance among the different function of the central nervous system.

Sleep has been postulated to serve many functions including:

1. Neural maturation 

2. Facilitaton of learning or memory

3. Cognition

4. Clearance of metabolic waste products generated by neural activity in the awake brain

5. Conservation of metabolic energy

There is some evidence for each of these functions but evidence supporting each of this ideas has been challenged.

We might postulate that principal value of sleep is to restore natural balances among the neuronal centres.

The specific physiological functions of sleep, however, remain a mystery, and are the subject of much research.