Most living creatures sleep for at least an hour a day. There is an internal biological clock that keeps track of time which is linked to the signal of the light of the day and the dark of the night. People do need a certain amount of sleep to be able to function properly and when there is a disturbance in the sleep - wake cycle, such person faces fatigue, inattention and irritability.
The human body operates and go through the same cycle of behavioural pattern everyday, the body gets accustomed to what it's used to so also with sleeping hours and any attempt to change might cause sleep disorder for several days.
Since nothing can be substituted for sleep, it's good to get enough hours for sleep because it restores the body and brain for future activity and helps improve memory alertness in learning new things.
The brain is responsible for information processing brought in through our senses. It understands, recognize and direct all parts of the body. The brain is divided into 3 parts:
The hindbrain is the continuation of the spinal cord. It further has 3divisions; The Medulla which regulates breathing, heart rate and blood pressure, The Cerebellum which controls coordinated movements and certain cognitive processes such as dancing, playing of musical instruments, athletics, languages and emotions, The Reticular formation which regulates arousal and attention.
The midbrain is a small region between the forebrain and the hindbrain which creates automatic responses to certain stimuli and it also initiates smooth movement.
The forebrain is the part of the brain which is responsible for most complex aspect of behavior and mental life. There are different part of the forebrain, they function to controls different actions, a part regulates hunger, thirst and sex drive, a part connects sensations and emotion, a part forms new memories, interpreted sensory information from the body to the brain another part analyze sensory information, it controls voluntary movements, abstract thinking and other complex cognitive activity, a part also connect and pass information from the left and right brain hemisphere.
The brain state of sleep is not too different from when awake, there is a transition for the brain when it drift from awake state to sleeping off. In the sleep state the breathe deepens, heartbeat slows down and blood pressure falls. Human being go through four (4)stages of sleep, the 3rd and 4th is the deep stage while the 1st and 2nd stage is the light sleep stage where by easy movement can wake up the person.
In the 1st and 2nd stage there is a similar blood pressure and breathing, the brain actively suppresses other movements, the brain is active in all the four(4) stage of sleep.
The brain works actively to recollect dreams, dreams represent the brain's attempt in making sense of meaningless stimulation during sleep. When we are asleep, the brain areas involved in emotions tend to be over activated, the sense send signals to the brain to interpret different situation, for example pain from mosquito bite or any sharp object that might have caused pain, discomfort during sleep which results to change of position to ease bodily discomfort.
The brain doesn't sleep, it's the intermediary that control both sleeping off and waking up The brain is active and receives all form of information both at sleep state and at wake state.
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