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According to modern psychologists, consciousness is the awareness of our being and our surrounding. Our awareness when conscious is able to process the little part that we experience, and we, therefore, use the information which we are consciously unaware of. When our mind is unconscious, the information processed is on multiple tasks which are simultaneous whereas the information that is processed in the conscious mind is sequential. Much of what our brain does happens when we are in our unconscious mind. Intentional blindness is the inability to recognize people or objects which surround us or are in our midst. Change blindness, on the other hand, is a form of unintentional blindness in which many individuals giving directions do not recognize a change in the person requesting for directions.

Brain Consciousness and Sleep

Human beings normally experience some cycles which vary seasonally in appetite, mood, and sleep. This is due to the migration of geese and hibernation of grizzly bears. Also, there are some disorders which affect individuals seasonally called Seasonal Affective Disorders. Among them is a mood illness that occurs during the months of dark winter and is related to lack of enough sun exposure. Sleep mysteries and dreams have started to break up in sleep laboratories in the world. When one closes his eyes but is still awake and conscious, the activities of the brains slow down to big amplitude, and that is the reason why a person who is dreaming shows up that activity. When a person closes his eyes but remains awake, the activity of the brain will tend to slow down to alpha waves, big amplitude which is slow and regular; that is the reason why a person will exhibit alpha waves in their brain while meditating.

The first stage of sleep lasts for about 10 minutes. As a person starts this stage, the brain waves move from beta to alpha and finally to theta. In this transition, one moves from relaxed wakefulness to sleep and can easily be awakened and think that he/she has not been sleeping. This may lead to experiencing sensory with stimulus and some hypnagogic sensations in the form of floating or falling. The second stage of sleep lasts for about 20 minutes; this is deeply relaxed but light sleep while showing some beta waves. Thus one can be easily awakened. It is also characterized by presence of rapid activity of brain waves and can lead to a person talking while still asleep. The transitional stage lasts for a few minutes together with the fourth stage lasting for about 30minutes. These are the stages where the brains start emitting big due to slow movement of delta waves in the stage 3 and rapidly in the stage 4. In the last stage, bedwetting and walking while asleep may occur as well as some other disorders such as night terrors and nightmares.


A normal human being spends one-third of his life sleeping; thus, if an individual stays awake for many days, it may cause dysfunction of the immune system and lack of concentration and eventually lead to high risk of accidents. Lack of enough sleep may lead to deprivation which causes fatigue and could eventually lead to death if the lack of sleep goes beyond a certain point. It may also lead to poor concentration, low immune system, and emotional irritability. Some hormones in form of cortisol and ghrelin tend to increase which could cause the decrease of lepton. Sleep is important as it helps us to repair and restore our brain tissue, build our fading memories, release the growth hormone through the pituitary gland; most important, it helps us to regain our consciousness when we are awake.

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