Autonomic Fibers,Preganglionic

《英文msh詞典》Autonomic Fibers,Preganglionic
[主題詞] Autonomic Fibers,Preganglionic
[入口詞] Autonomic Fiber,Preganglionic
[入口詞] Fiber,Preganglionic Autonomic
[入口詞] Fibers,Preganglionic Autonomic
[入口詞] Preganglionic Autonomic Fiber
[入口詞] Preganglionic Autonomic Fibers
[中文釋義] 自主神經纖維,節前
[英文釋義] Nerve fibers which project from the central nervous system to autonomic ganglia. In the sympathetic division most preganglionic fibers originate with neurons in the intermediolateral column of the spinal cord,exit via ventral roots from upper thoracic through lower lumbar segments,and project to the paravertebral ganglia; there they either terminate in synapses or continue through the splanchnic nerves to the prevertebral ganglia. In the parasympathetic division the fibers originate in neurons of the brain stem and sacral spinal cord. In both divisions the principal transmitter is acetylcholine but peptide cotransmitters may also be released.