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Diseases of The Brain and Nervous System

The Nervous system comprises of the brain, the spinal cord, the nerves emanating from them and their innervations of muscle fibres. The human race is superior and special to the other living beings due to the unique anatomy and physiology of human nervous system. Especially the cortex of the brain (the grey layer of the brain surface) is highly evolved and complex. Other organs of the human beings are similar or even weaker as compared to those of the other animals, but the humanrace proves superior because of the exceptional mental power & ability, as well as logic, memory and vocabulary all due to the cortex of the brain.

The cortex consists of approximately 100 billion neurons. According to an estimate, an average person uses about 5 to 10 percent of his brain capacity, but a genius uses his brain up to 15 percent. Therefore it can be said that any person can become a genius by learning how to use his brain more and putting it frequently to task.

An adult human brain is approximately 1200 to 1400 grams in weight. Though our brain weighs only 1 to 2 percent of total body weight, it uses up approximately 25 percent of the oxygen intake of the body and 70 percent of the total glucose available to the body. The lower group of chordate animals do not have a developed organ like brain and therefore their functions are autonomous. So they don't feel pain, e.g. a fly etc. A large head, in effect does not mean more intellectual capacities. The structure of the brain. matters more than its size.

Diseases of The Brain and Nervous System