When our nervous system (both CNS and PNS) undergo any abnormal condition or state then our whole body regulation will be changed. This is called Disorders of nervous system. The nervous system is a complex, sophisticated system that regulates and coordinates body activities. It also conducts motor information to the body’s skeletal muscles, cardiac muscles, smooth muscles, and glands. There are 31 pairs of spinal nerves along the spinal cord. These nerves each contain both sensory and motor axons.