Your Nervous System Runs Everything — Here’s Why That Matters for Your Health

By Dr. Maggie McInnes | The Wellness Tribe | Denver, CO

Most of us were taught that the heart is the most important organ. Or maybe the brain. And while those are certainly vital, there’s a system that quietly governs everything — every heartbeat, every breath, every immune response, every thought, every emotion, every moment of healing — and most people have never given it much thought.

That system is your nervous system. And understanding it just a little bit changes everything about how you think about health.

At The Wellness Tribe, the nervous system isn’t just something we reference in passing — it’s the foundation of everything we do. So let’s talk about it: what it is, what it controls, what happens when it’s dysregulated, and what you can actually do to support it.

What Does the Nervous System Actually Do?

The short answer is: everything.

Your nervous system is the master communication network of your body. It includes your brain, spinal cord, and the vast web of nerves that extends to every single organ, tissue, and cell in your body. Every signal that travels in your body — from your brain to your heart, from your gut to your brain, from your skin to your immune system — travels through the nervous system.

Here’s a partial list of what your nervous system controls:

• Heart rate and blood pressure
• Breathing
• Digestion and gut motility
• Immune function and inflammation response
• Hormone production and regulation
• Sleep and wake cycles
• Emotional regulation and stress response
• Sensory processing
• Movement and coordination
• Healing and tissue repair

When the nervous system is functioning well — when signals are traveling clearly and efficiently — your body has an extraordinary capacity for self-regulation and self-healing. This is what chiropractors call innate intelligence: the body’s built-in wisdom to maintain balance, adapt to stress, and heal itself.

When the nervous system is compromised — when there’s interference, dysregulation, or chronic stress — all of those systems begin to suffer, often in ways that are hard to trace back to their source.

The Two Branches: Sympathetic and Parasympathetic

To understand nervous system health, it helps to understand its two primary operating modes.

The sympathetic nervous system is your body’s accelerator. It’s the system that activates when you’re under stress — physical, emotional, or perceived. It’s the “fight-or-flight” response: heart rate increases, blood pressure rises, digestion slows, immune function is suppressed, muscles tense, and your attention narrows. This system is brilliant and life-saving in genuine emergencies.

The parasympathetic nervous system is your body’s brake pedal. It’s the “rest-and-digest” or “tend-and-befriend” mode: heart rate slows, digestion activates, immune function strengthens, muscles relax, and your body enters a state of repair and restoration. This is the state where healing happens.

The problem for most modern humans — especially in a high-achieving, high-stimulation city like Denver — is that we spend far too much time in sympathetic dominance. Chronic stress, poor sleep, processed food, too much screen time, emotional overwhelm, and yes, spinal subluxations all push the nervous system into a state of chronic activation.

Over time, this chronic sympathetic dominance is associated with anxiety, depression, poor immune function, digestive issues, hormonal imbalances, sleep disorders, chronic pain, and a whole host of conditions that we tend to treat as separate problems — when they often share a common root.

What Dysregulates the Nervous System?

Understanding this is key to understanding why so many people feel chronically unwell even when nothing is “wrong” by conventional medical standards.

Physical stressors: Spinal misalignments (subluxations), poor posture, sedentary behavior, physical injuries, chronic muscle tension, and lack of movement all create physical interference in the nervous system. The spine literally houses and protects the spinal cord — when it’s misaligned, it affects neurological function directly.

Chemical stressors: Processed foods, alcohol, environmental toxins, medications, and nutritional deficiencies all affect the chemistry that the nervous system depends on to function.

Emotional and psychological stressors: Chronic anxiety, unresolved trauma, relational stress, and the constant low-level hum of modern life keep the sympathetic nervous system activated in ways that have very real physiological consequences.

These three categories — physical, chemical, and emotional — are what chiropractors often call the “three T’s”: Traumas, Toxins, and Thoughts. And they compound each other. A body that is physically tense from subluxations is more vulnerable to emotional stress. A nervous system that is chronically activated by anxiety is less resilient to physical stressors.

What Is a Subluxation — and Why Does It Affect the Nervous System?

A subluxation is a misalignment in the spine that creates interference in the nervous system. It’s not necessarily dramatic — you don’t have to have been in a car accident or fall off a ladder to develop subluxations. They can result from the accumulated stress of everyday life: poor posture, repetitive movements, emotional tension, birth trauma, or simply sitting too much.

What makes subluxations significant isn’t just the physical misalignment. It’s the neurological interference they create. When a vertebra is out of its optimal position, it can put pressure on or irritate the surrounding nerves — disrupting the flow of information between the brain and the body.

Think of it like a dimmer switch on a light. The electricity is still flowing, but not at full capacity. Over time, the organs, tissues, and systems governed by those nerves begin to function at less than their full potential — often without any obvious pain or symptoms, until the interference becomes significant enough to cause a noticeable problem.

Chiropractic adjustments restore proper alignment and remove that interference — turning the light back up.

How to Regulate Your Nervous System: Practical Tools

Chiropractic care is one of the most powerful tools for supporting nervous system health — but it works best as part of a broader lifestyle that supports regulation. Here are some of the most effective practices:

Chiropractic adjustments: Regular adjustments remove subluxation-based interference and help shift the nervous system toward parasympathetic (rest-and-heal) dominance. Many patients notice an immediate sense of calm and ease following an adjustment — this is the nervous system settling.

Breathwork: Deep, slow diaphragmatic breathing is one of the fastest ways to activate the parasympathetic nervous system. Even five minutes of intentional breathing — in for 4 counts, out for 6 — can measurably shift your nervous system state.

Cold exposure: Brief cold showers or cold water immersion activate the vagus nerve — the primary nerve of the parasympathetic system — and have been shown to improve nervous system resilience and emotional regulation over time.

Movement: Regular, varied movement — especially activities that involve rhythm, coordination, and full-body engagement like yoga, dance, or hiking — provides rich proprioceptive input that nourishes the nervous system.

Sleep: The nervous system does its deepest repair work during sleep. Prioritizing 7–9 hours of quality sleep is non-negotiable for nervous system health.

Nature exposure: Time spent in natural environments measurably reduces cortisol levels and supports parasympathetic tone. Even a walk through Wash Park counts.

Reducing screen time and digital stimulation: Constant screen exposure keeps the brain in a state of low-grade alertness that prevents full parasympathetic rest. Creating screen-free wind-down time before bed is one of the simplest interventions you can make.

Mindfulness and meditation: Regular meditation practice literally changes the structure and function of the brain over time, improving emotional regulation, reducing stress reactivity, and strengthening parasympathetic tone.

The Chiropractic Piece

At The Wellness Tribe, every adjustment we make is made with the nervous system in mind. We are not simply moving bones. We are restoring communication — clearing the channel between the brain and the body so that your innate intelligence can express itself fully.

We’ve seen patients whose chronic anxiety shifted after consistent care. Patients whose digestion improved. Patients whose sleep transformed. Patients who simply feel more like themselves — more regulated, more resilient, more present — after making chiropractic a regular part of their wellness practice.

This is not magic. It’s physiology. And it’s available to you.

Your nervous system is working for you, every single moment of every single day. The least we can do is support it.

Come find your tribe.

About The Wellness Tribe — Denver Chiropractic & Nervous System Health

The Wellness Tribe is a vitalistic, holistic chiropractic practice serving Denver and the surrounding communities. Founded by Dr. Maggie McInnes, we specialize in prenatal and postnatal chiropractic, pediatric chiropractic, and whole-family wellness care. We are proud to serve the Platt Park, Washington Park, and South Pearl Street neighborhoods and beyond.