Memory lapses
Unable to concentrate
Mood swings
Irritability
Drowsiness
Neurons begin to malfunction
Neural connections begin to deteriorate
Calculation impairment
Heart rate fluctuations
Constant yawning
Impaired immune system
Reduced cell growth
reduced cell repair
reduction in physical performance
When we sleep, the neurons get a chance to shut down and carry out some self-repairs. Without sleep, the neurons end up getting polluted and depleted. As we sleep, the brain gets a chance to make neural connections which may otherwise degenerate as a result of the lack of activity. When we are in deep sleep, there is an heightened production of growth hormones and cell production. There is also reduced protein breakdown. Proteins are responsible for the repair of cells damaged by ultraviolet rays or even stress and this is why deep sleep can also be referred to as beauty sleep. During deep sleep, the part of the brain that deals with social interactions, decision making and emotional experiences reduces activity and this helps in optimizing emotions when we are awake.