Any measurement of the autonomic nervous system, the part of the nervous system that regulates involuntary action, as of the intestines, smooth muscle, heart, and glands, and that is divided into two physiologically and anatomically distinct, mutually antagonistic systems, the sympathetic nervous system and the parasympathetic nervous system. The nervous system is the organ system which, along with the endocrine system, correlates the adjustments and reactions of the organism to its internal and external environment via transmission of information, in the form of electrochemical impulses, throughout the body.
peripheral nervous system morphological measurement +