1 Rheumatoid arthritis (RA), an autoimmune disease that can cause pain in the joints. 2  RA occurs when the immune system attacks the joints and muscles causing joint pain and stiffness. 3  Lupus, an autoimmune disease like RA, that causes inflammation in the joints, as well as in the tendons, skin and other connective tissues. Lupus, an autoimmune disease like RA, that causes inflammation in the joints, as well as in the tendons, skin and other connective tissues. 2  Gout, which occurs when uric acid crystals build up in the joints, and causes joint inflammation, pain and tenderness.
Although the ANS is also known as the visceral nervous system the ANS is only connected with the motor side. Most autonomous functions are involuntary but they can often work in conjunction with the somatic nervous system which provides voluntary control.
The motor cortex of the brain is a region in the posterior part of the frontal lobe that controls voluntary movement.Neurons in this region of the brain send signals down the spinal cord to the muscles to coordinate movements.he motor cortex works in harmony with the premotor areas in the frontal cortex to plan out and execute voluntary movement. It is made up of Betz cells, special neurons that send axons down into the spinal cord. These axons communicate with spinal neurons by synaptic transmission.