| 词汇 | parasympathetic-nervous-system |
| 释义 | parasympathetic nervous system noun[ Cusually singular ] anatomy specializeduk /ˌpær.ə.sɪm.pəˌθet.ɪk ˈnɜː.vəs ˌsɪs.təm/ us /ˌper.ə.sɪm.pəˌθet̬.ɪk ˈnɝː.vəs ˌsɪs.təm/ the part of the nervous system that makes the heart beat more slowly and relaxes muscles when the body is resting: The parasympathetic nervous system relaxes the body after a stressful event. The heart responds to changes in the body controlled by the sympathetic and the parasympathetic nervous systems. The parasympathetic nervous system controls our ability to sleep, eat, and digest food. Studies suggest greater impairment of the parasympathetic nervous system with increasing severity of dementia. When environmental demands are low, the parasympathetic nervous system is activated to reduce cardiac output and to promote calm states. The brain & nervous system abducens nerve abducent nerve accessory nerve alexithymia allism glossopharyngeal nerve grey matter hemispheric hemispherical hindbrain neurofibrillary neurogenic neurogenically neuroglia neuroglial reticular formation rhinencephalon rhombencephalon right brain right-brained Comparesympathetic nervous system |
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