Archaic designation for a condition in which the parasympathetic autonomic system is reputedly overactive. SYN: parasympathotonia, sympathetic imbalance. [vago- + G. tonos, strain]
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va·go·to·nia .vā-gə-'tō-nē-ə n excessive excitability of the vagus nerve resulting typically in vasomotor instability, constipation, and sweating compare SYMPATHICOTONIA
va·go·ton·ic -'tän-ik adj
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va·go·to·nia (va″go-toґne-ə) [vagus + ton- + -ia] hyperexcitation of the vagus nerve, resulting in increased parasympathetic tone. vagotonic adjMedical dictionary. 2011.