How Your Nervous System Works

Published On: March 21, 2025By Tags: , ,

We hear a lot of different terms related to the nervous system. I thought I would share a quick review to make sure you have a basic understanding of how the nervous system works. 

Image by Gerd Altmann from Pixabay

The nervous system is made up of the central nervous system and the peripheral nervous system. The central nervous system includes the brain and spinal cord (the decision maker). The peripheral nervous system includes the nerves that run throughout the whole body. 

The Peripheral Nervous System consists of:

The Somatic Nervous System, also known as the voluntary nervous system, is a part of the peripheral nervous system that controls voluntary body movements and carries sensory signals from the body back to the central nervous system.

The Autonomic Nervous System, or involuntary nervous system, regulates involuntary physiologic processes including heart rate, blood pressure, respiration, digestion, that we don’t have to think about, to keep us alive.

The Autonomic Nervous System consists of:

The Sympathetic Nervous System which increases energy with effects like increased heart rate, blood pressure, and sweating. This is often referred to as ‘fight or flight’.

The Parasympathetic Nervous System conserves energy by lowering the heart rate for things like digestion. This is often referred to as ‘rest & digest’ or ‘stay & play’. This is the natural state our body should be in about 80% of the time.

All healing occurs in a parasympathetic state; this includes healthy digestion, detoxification, & cellular regeneration.

When we are in a constant state of ‘fight or flight’ it leads to:

  • Tired but wired feeling, not sleeping through the night, often wide awake between 1–4 am and exhausted upon waking.
  • Digestive issues such as constipation and bloating, despite a healthy balanced diet. Stress is one of the most common reasons for constipation.
  • Premature grey hair is very common in those who experienced high stress or trauma. These situations can also increase oxidative stress and free-radical production within the body.
  • Increased blood pressure and elevated blood sugar levels.
  • Weight-gain especially around the belly.
  • Feelings of not being able to calm down or slow down mentally and physically.

So you can see that if you are stuck in ‘fight or flight’ your body can’t optimally perform its basic functions. This leads to ill health and potentially ends up as disease long-term.


Main – Image by Lakshmiraman Oza from Pixabay

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About the Author: Lisa Gylsen

Hi, I’m Lisa, HealthCoachLisa and a Holistic Health Coach with 30 years of experience in holistic living and a deep passion for reconnecting people to their innate healing power. My journey began with an introduction to superfoods and a life-changing moment hearing Jeffrey Bland speak on nutrition. Over time, I researched, experimented, qualified, marketed, trained, and coached as my path evolved from a functional to the holistic approach I embrace today—one rooted in nature as the true foundation of health freedom. My 12 week 1:1 coaching program, The Vital Body Method, focuses on three pillars: Rooted Energetics - connecting with nature, growing your intuition, and letting go of limiting beliefs, Precision Energetics - using science-backed Energy Medicine technology to help bring the body back into coherence with frequency balancing until you can completely do this naturally, and Embodied Vitality - embedding new holistic practices that reconnect you with nature and developing your personalized vitality toolkit for life. Contact Details Email: lisa@lisagylsen.com Website TikTok Instagram