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.
Motor cortex of the brain controls voluntary muscle movements. It is an area of the Frontal lobe of the brain. Somato-sensory cortex receives sensory inputs from our senses. Distribution of the body parts in the Motor cortex is as following diagram: (In the above diagram,Brain is sectioned/cut in a plane at right angles to the plane of the first diagram. It shows one half of the Brain,controlling one half of the face,one half trunk.one side leg and one side arm.)