
The parasympathetic nervous system, aka the PSNS, is a network of nerves, led by the vagus nerve (the 8th chakra or the seat of the soul). It relaxes your body after periods of stress or real or perceived danger. The PSNS also helps run some of our basic functions such as digestion. Sometimes, it’s referred to as the rest and digest response.
What is the Parasympathetic Nervous System?
The PSNS is part of your autonomic nervous system. Some people refer to it as your ‘automatic nervous system.’ Why? Basically, it’s because the PSNS is responsible for many functions you don’t have to think about to control. They kind of work all by themselves. These functions include: your heart rate, blood pressure, digestion, urination and sweating, among other things.
What does the PSNS do?
The Parasympathetic Nervous System relaxes or reduces your body’s activities. It calms and soothes you. The PSNS can do some of the following:
- Eyes – constricts and contracts your pupils to limit how much light enters. The PSNS can also make changes that can improve your close-up vision and causes tear production.
- Nose and Mouth – the Parasympathetic Nervous System is responsible for your mouth’s saliva production. It also helps your nose produce mucus. These functions are helpful in digestion and rest.
- Lungs – the PSNS tightens airway muscles, reducing the amount of work they do during rest periods.
- Heart – it lowers your heart rate and the pumping force of this instrumental organ.
- Digestive Tract – the Parasympathetic Nervous System increases your rate of digestion. It also diverts energy from other organs and functions to help your body break down food. The PSNS alerts the pancreas to make and release insulin. This helps your body break down sugars into forms your cells can use.
- Waste Removal – The PSNS relaxes muscles in your colon and bowels that help control when you urinate or defecate.
- Reproductive System – this system manages some of your body’s sexual functionality including feelings of arousal. It helps with erections in men and lubrication in women.
What’s the difference between the Parasympathetic Nervous System (PSNS) and the Sympathetic Nervous System (SNS)?
These two systems have complimentary and opposite functionality. For example, your sympathetic nervous system (SNS) carries signals to your body to keep it on high alert. Many people think of these as the stress responses such as fight, flight or freeze. Conversely, the Parasympathetic Nervous System allows your body to return to standard activity levels after a stressful event. The PSNS also manages the activity in organs throughout your body when you feel calm and safe which is vitally important to keeping you alive and healthy.
Where can you find the PSNS in the body?
The Parasympathetic Nervous System uses four of your twelve cranial nerves. These nerves connect directly to your brain. Three of the four nerves only involve your senses and glands that are connected to your eyes, nose and mouth. The fourth nerve, which is known as the vagus nerve, connects part of your mouth and extends down through your neck to your chest and your abdomen. The vagus nerve is vital to the PSNS, making up about 75% of it. It connects your heart, lungs, and other vital internal organs.
How does the Parasympathetic Nervous System help you reduce stress?
Stress is everywhere these days – from Zoom meeting fatigue, a train that makes you late for works, relationship troubles and so much more. Stress makes your body feel like you want to run away or fight. In some cases, it can also cause us to freeze (be inactive, almost paralyzed by anxiety).
These high levels of stress impact the body by making it think it’s in danger. This heightened level of stress elevates your heart rate, dilates your pupils and increases your blood pressure. It brings you into a hyper-alert state to protect you from the real or perceived danger.
The PSNS steps in to downregulate the body. The vagus nerve sends signals to other parts of your body that all is well and that you can calm and soothe. It tells your brain what to do instead of your body. A healthy parasympathetic nervous system can reduce your risk of heart disease, increase your digestive metabolism and decrease migraines. It also helps you feel better emotionally.
We will certainly delve more into the connection between the Parasympathetic Nervous System and emotions in future articles. I hope this has given you a good overview of the PSNS and a deeper understanding of how it functions. I often work with folks on teaching them how to activate the parasympathetic nervous system. If you’re interested in learning more, why not set up a free, 60-minute consultation today? You can schedule it at my Calendly link.


