Almost Every Horse Problem Starts In The Nervous System

If I had to trace most of the issues I see in horses back to one common thread… it wouldn’t be the saddle.

It wouldn’t even be the bit.

It would be the nervous system.

Let me explain.

The nervous system is the body’s command center the wiring that coordinates every muscle, joint, and organ. It controls posture, balance, digestion, movement, and emotional responses. It decides whether your horse feels safe enough to stretch or tense enough to brace.

When the nervous system becomes dysregulated — living in a state of ongoing fight, flight, or freeze — the entire body begins to adapt around that stress. Over time, those adaptations can change how the horse moves, digests, and behaves. Most physical problems aren’t from “one bad day,” but from many small compensations that start with tension and accumulate over time.

Now heres an example:

Imagine a horse who’s later diagnosed with kissing spine.

If we trace the chain of events, it might theoretically look something like this:

An ill-fitting saddle restricted movement through the thoracic sling.

The horse began to hollow his back to avoid pressure.

A well-meaning rider encouraged more “frame” and connection through the reins.

Increased tension in the poll and jaw affected the vagus nerve — a key communication line between the brain, gut, and body. (And the VFC but thats a whole other conversation)

The core muscles disengaged. The back tightened.

The nervous system stayed in a protective state for months or even years.

Eventually, muscle recruitment patterns shifted, leading to chronic tension and limited spinal mobility.

Over time, the bones adapted to these forces, and we end up seeing structural changes.

Of course, saddle fit, hoof balance, rider biomechanics, diet, and training history all play vital roles. But when you look closely, the nervous system is often a key player early in that cascade. And it’s often overlooked.

Muscles don’t act on their own they only do what the nerves tell them to.

When nerve signals are altered by pain, fear, or compensation, some muscles become overactive while others underperform. That imbalance is what we describe as “tight hamstrings,” “weak topline,” or “stiff shoulders.”

The same principle applies internally.

The autonomic nervous system , which runs in the background , controls the heart, lungs, and digestive organs. When a horse lives in sympathetic mode (fight or flight), blood flow shifts away from digestion. The “rest and digest” parasympathetic side then ebecomes underactive.

That’s when we may see ulcers, poor nutrient absorption, tension-related behaviors, or inconsistent performance.

And it’s not a one-way street. A stressed or imbalanced gut can also send distress signals back to the brain through the vagus nerve , a relationship called the gut-brain axis. Emerging equine research shows this two-way communication between the gut, microbiome, and nervous system influences stress responses, movement, and even behavior. There are several studies in humans on this I suggest everyone look into.

The good news… is that the nervous system is highly adaptable.

When we provide calm handling, consistent routines, appropriate movement, turnout, forage, and gentle bodywork, the system begins to regulate itself again.

The horse starts to move fluidly.

Muscles release.

Organs function more efficiently.

The mind softens.

They begin to trust their body , and you , again.

Balance doesn’t start in the muscle.

It starts in the wiring that tells the muscle what to do.

So the next time your horse shows resistance, tension, or soreness, instead of only asking “Where does it hurt?”, try asking:

“What part of their nervous system isn’t being heard?”

That’s often where real healing begins. And this is all where “self carriage” starts… in the brain and nervous system.

I have a personal theory that in humans, most issues also arise from a dysregulated nervous system… but thats just a thought and for another time.

If you’d like to explore the research behind these ideas, here are some excellent resources for both horses and humans: (just plug these into google)

• Understanding the True Role of the Autonomic Nervous System – Vet Compendium

• Muscular and Neuromotor Control and Learning in the Athletic Horse – Comparative Exercise Physiology, Brill Journal

• The Relationship Between the Equine Gut and Brain – SUCCEED Veterinary Education

• The Gut Microbiome of Horses: Current Research on the Equine Enteral Microbiome – Animal Microbiome Journal

• Diet and the Microbiota–Gut–Brain Axis: Sowing the Seeds of Good – NIH / PMC Review

• Parts of the Nervous System in Horses – Merck Veterinary Manuallsl