They rely upon mechanical, chemical and electrical processes in order to sense the body's condition and environment. That information is then transmitted to the brain via nerve impulses. In addition to influencing the physical functions of our body, the nervous system also influences how we act or react to stress. The fight or flight response is a good example. This is a hormonally stimulated state to prepare the body for an upcoming challenge.
Chemical reactions influence the heart, nervous system, muscles and other areas of the body.
We need to supply this system with good food so that our nerves can accurately communicate and handle the various stresses to which they are constantly exposed. A Major Factor in Nervous System Health Stress is a factor in every life, and the degree to which it affects us negatively is largely determined by how we react to the stresses around us. Even though everyday hassles may seem minor, researcher Dr. Richard Lazarus found that in combination they could have a bigger impact on our health than traumatic events such as death, major illness or financial difficulties. Our nervous system does not differentiate between a physical threat and an emotional threat. This defense mechanism can damage our health when it is constantly evoked unnecessarily and fighting or fleeing does not dispel the energy released by it.