Essay about The Nervous System

1120 Words Nov 12th, 2014 5 Pages
The nervous system is a major system in the body that is the master of control and communication in and throughout the body (Marieb and Hoehn 345) There are two parts of the nervous system, the central nervous system, which consists of the brain and the spinal cord, and the peripheral nervous system, which is everything outside of the brain and the spinal cord. The peripheral nervous system deals extensively with sensations of the body and these sensations are sent to the central nervous system for interpretation (Marieb and Hoehn 346). Neuroglia, or glial cells, are supporting cells of the nervous system. Satellite cells are a type of neuroglia in the peripheral nervous system that surround neuron cell bodies (Marieb and Hoehn 348) These cells act like babysitters for the peripheral nervous system and help regulate what material goes into the cells and what comes out. The peripheral nervous system plays a major role in pain detection in the body. Pain is a perceptive, complex, subjective and multidimensional sensation (Costa and Neto). Multiple molecular and cellular mechanisms acting with the central and peripheral nervous systems produce different forms of pain. In dorsal spinal ganglia and trigeminal ganglion, satellite cells create a relationship with the surrounding neuronal bodies. Satellite cells and neurons interact to create neuronal excitability, which play a role in the field of pain. Satellite cells come from the pluripotent neural crest cells (Costa and…

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