The modern concept of the autonomic nervous system is that of a vast and varied mechanism controlling the vegetative processes of the body. It consists of the ganglions that are anatomically and functionally connected with the central nervous system through the visceral efferent components of the cerebral and spinal nerves and the nerves that arise in these ganglions.1 It is composed of the sympathetic system, which includes the cervicothoracic and lumbar divisions, and the parasympathetic system, which includes the cranial and sacral divisions. Extensive studies of the autonomic system have been carried out to show its regulation of the so-called vegetative processes in the body: digestion, respiration, circulation, excretion, urination, defecation and secretion. The relation of the autonomic system to changes in the blood pressure, basal metabolism and vascular tonus and to the action of the endocrine glands, particularly the thyroid, pituitary and adrenal glands, forms an interesting
BILCHICK EB. COLOR OF THE NASAL SEPTUM: Its Relation to Autonomic Imbalance. Arch Otolaryngol. 1936;24(6):768–770. doi:10.1001/archotol.1936.00640050783011
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