What it means
The main nerve of the parasympathetic nervous systempar-uh-sim-puh-THET-ik NER-vus SIS-temThe part of the autonomic nervous system that calms the body, slows the heart and helps digestion during rest.para- besidesympathetic the fight-or-flight systemFull entry . It slows the heart rate, controls parts of swallowing and speech, and stimulates the stomach and intestines. Straining to pass stool, vomiting, a full bladder or pressing on the carotid area can stimulate it and cause a sudden slow heart rate and fainting (a vasovagal response).
For the nurse
Teach clients with heart problems not to strain on the toilet. When removing stool by hand or suctioning, watch for a slowing heart rate.
At a glance
| Spanish | nervio vago |
|---|---|
| Also written | vagus nerves |
Related terms
bradycardia
A heart rate slower than normal; in an adult, fewer than 60 beats per minute.
autonomic nervous system
The part of the nervous system that controls body functions without conscious thought, such as heart rate, breathing and digestion.
parasympathetic nervous system
The part of the autonomic nervous system that calms the body, slows the heart and helps digestion during rest.