The nervous system, and particularly the brain, is the part of the body that is the major locus of cognition. It receives information from the senses and "processes" it. Evidence that the brain is particularly important is that it uses a far greater percent of the blood supply than its percent weight of the body, and according to some physiologists, approximately half of the genome is directly related to brain function.
The human nervous system has a fairly complex gross structure, and an incredibly complex microstructure. Grossly one can identify many different parts. The central nervous system consists of the brain, with its many substructures, and the spinal cord. The peripheral nervous system consists of the cranial nerves, the
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