parasympathetic nerves 中文意思是什麼
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The parasympathetic nerves enhance both tone and motility, and relax sphincters.
副交感神經既增加張力，也加強運動，並鬆弛括約肌。 -
Above influences are conformed by central nervous system and transmitted to sinoatrial node by sympathetic and parasympathetic nerves. in physiological conditions the parasympathetic nerve modulation to sinoatrial node play more important roles than sympathetic nerve and is the main source of the heart rate variability
在正常完整機體，心交感及心迷走均對竇房結施加緊張性影響，但在安靜狀態下心迷走緊張性影響居主導地位且是產生心率變異性（指逐次心搏rr間期不斷波動的現象）的主要原因之一。
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