Relating to the part of the autonomic nervous system that counterbalances the effects of the sympathetic nervous system. It primarily functions to conserve energy and promote restorative processes. The parasympathetic nervous system, often referred to as the "rest and digest" or "feed and breed" system, slows the heart rate, constricts pupils, stimulates digestion, and relaxes muscles. It plays a critical role in maintaining homeostasis and facilitating normal bodily functions during periods of relaxation and inactivity. The parasympathetic nervous system uses acetylcholine as its primary neurotransmitter. This system works in opposition to the 'fight-or-flight' sympathetic system.
Parasympathetic meaning with examples
- After finishing a stressful presentation, the parasympathetic nervous system kicked in, slowing my racing heart and allowing me to relax. My body shifted from a state of high alert to a state of calm.
- Deep breathing exercises are known to activate the parasympathetic nervous system, promoting relaxation and reducing feelings of anxiety. This allows the body to find homeostasis.
- A large, leisurely meal triggers the parasympathetic response, facilitating digestion and nutrient absorption. Energy is directed away from muscles, for example.
- Meditation practices encourage the parasympathetic nervous system, helping to lower blood pressure and improve overall well-being, moving the body away from a stressed state.
- The vagus nerve, a key component of the parasympathetic system, plays a crucial role in regulating heart rate, breathing, and digestion. It helps to keep the body working smoothly.