◆心迷走神经(副交感神经)及其作用 来源:延髓迷走神经背核和疑核 支配范围:同交感神经,心室肌少于心房肌 Parasympathetic Sympathetic Parasympathetic Sympathetic Vagus chain ACh(SA Thoracic SA node AV node 90%E Bundle Lumbar of His :" sacral GURE 1 nic innervation of the cardiovascular system. ACh, acetylcholine: NE, norepi e Fleshandbones com Davies et al: Human Physiology◆ 心迷走神经（副交感神经）及其作用 来源: 延髓迷走神经背核和疑核 支配范围: 同交感神经,心室肌少于心房肌