The Autonomic Nervous System controls the Automatic (Involuntary) functions in our body. Examples are breathing, heart rate, bowel motility and sweating. The components are the Sympathetic nerves (freight reflexes / up regulators / agitators) and the Parasympathetic (flight reflexes / down regulators / relaxers).
This test is used many times in conjunction with Neurotransmitter testing and treatment for anxiety, depression and ADHD. It allows for the balance of conduction through the nerves, while the Neurotransmitter testing allows balancing the chemicals in the synapses (spaces) between the nerves. Improving the entire conduction, improves communication and health.