Sympathetic Control of Sweating and Cutaneous Active Vasodilatation

摘要: Eccrine sweat glands are innervated by postganglionic cholinergic fibers. Activities of these fibers, which can be percutaneously recorded as multiunit burst activities using a microelectrode technique, controlled central mechanisms. There two distinctive mechanisms for sweating. The mechanism that governs the in general body surface, except palm and sole, involves detection local temperature integration thermal nonthermal signals. preoptic anterior hypothalamus is an important region functions. signals from various sites (including CNS skin) integrated at thermosensitive neurons areas, sudomotor generated. Nonthermal also converge to modify thermosensitivity and, thus, outflow. In this way, they contribute preservation homeostasis situations competition between drives. skin sole probably several structures including reticular formation, limbic system, neocortex. Mental stimuli not only elicit responses nerve activity destined but influence generalized sweating alter outflow surface. Several neuropeptides found terminals around gland. These peptides may have role increasing blood flow. hypothesis has been proposed efferents mediate active cutaneous vasodilatation.