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.
There are three types of motor nerves. Somatic motor nerves control skeletal muscles, which cause movement. Special visceral motor nerves control muscles in the face and neck. General visceral motor nerves control the smooth muscles that lack voluntary control, such as the heart. Another term for a motor nerve is motor neuron.. Motor nerves work by sending chemicals, known as neurotransmitters, across a gap between the nerve and the muscle. The neurotransmitters bind to receptors in the muscle fiber and trigger movement.