The Nervous System



The nervous system is central

All living organisms are able to detect changes within themselves and in their environments. Changes in the external environment include those of light, temperature, sound, motion and odor. Changes in the internal environment include those in the position of the head and limbs as well as in the internal organs. Once detected, these internal and external changes must be analyzed and acted upon in order to preserve the integrity, well-being, and status quo of the organism.

The nervous system is based upon the almost instantaneous transmission of impulses from one region of the body to another along specialized nerve cells. In the centralized system of the human body, a portion of the nervous system has a dominant role in coordinating information and directing responses. This centralization consists of the brain and spinal cord. Impulses are carried to and from the brain and spinal cord by nerve fibers that make up the peripheral nervous system.

Start with the spine

Now that you have a greater understanding of the spine and its important relationship to the nervous
system, we can take a closer look at some of the nerves and see some of the problems that can develop when the spine is misaligned.