Most of the major muscle groups used or movement and communication are voluntary. Involuntary muscles would be things like your heart and the muscles around your intestines, which you generally cannot consciously control. The skeletal is called voluntary muscle because it is usually subject to conscious control.
Medical Definition of Autonomic nervous system. Autonomic nervous system: A part of the nervous system that regulates key involuntary functions of the body, including the activity of the heart muscle; the smooth muscles, including the muscles of the intestinal tract; and the glands.
The autonomic nervous system is the part of nervous system that controls involuntary functions such as blood pressure, heart rate, sweating, bladder, bowel and sexual function.Problems in the autonomic nervous system involving the nerve connections between the brain and other organs are often difficult to diagnose.he labâs expert staff administers highly advanced, noninvasive diagnostic tests, including: 1  Cardiovascular autonomic tests: These three tests, which take an hour and a half, determine how well a patientâs autonomic nervous system regulates heart rate and blood pressure.