《英文msh詞典》System,Sympathetic Nervous
[入口詞] System,Sympathetic Nervous
[主題詞] Sympathetic Nervous System
[英文釋義] The thoracolumbar division of the autonomic nervous system. Sympathetic preganglionic fibers originate in neurons of the intermediolateral column of the spinal cord and project to the paravertebral and prevertebral ganglia,which in turn project to target organs. The sympathetic nervous system mediates the body's response to stressful situations,i.e.,the fight or flight reactions. It often acts reciprocally to the parasympathetic system.