When most people think about chiropractic, they think about backs and necks. That makes sense. But what I really care about when I check your spine is your nervous system, and a recent research review does a great job of explaining why.
Your body is one connected system
We tend to talk about the body in separate parts: the nervous system, the hormone (endocrine) system, the immune system. In reality, they don't work alone. They're in constant conversation with each other.
Your nervous system senses what's going on and interprets it.
Your hormones carry messages and fine-tune the response.
Your immune system defends you and helps you heal.
Researchers call this the neuroendocrine-immune system. That's a mouthful, so I just think of it as your body's communication network. Every movement, every stress response and every immune reaction depends on it.
What the research review says
In a review paper titled Vertebral Subluxation and Systems Biology, Haas and colleagues looked at how this network coordinates the body, and what can happen when the signals get distorted.
Their key point is simple: your body responds to the information it receives. When the information is clear, the response is organized. When the information is distorted, the response gets less organized too.
Where the spine comes in
Chiropractors use the word "subluxation" to describe a spot in the spine that isn't moving or functioning the way it should. The review explains that a subluxation can change the signals traveling from your spine to your brain, including information about position, movement and stress. Those signals feed into the parts of your brain that manage things like stress hormones and your "fight or flight" versus "rest and digest" balance.
The effect isn't always dramatic. Sometimes it's subtle and builds up quietly over time. But the quality of your body's response can only be as good as the quality of the information it receives.
What changes after an adjustment
The review pulls together studies that measured changes in the body after chiropractic adjustments. The authors point to shifts such as:
Better heart rate variability, a sign your nervous system is adapting well to stress
More normal cortisol (stress hormone) patterns
Changes in markers of inflammation
More balanced "fight or flight" and "rest and digest" activity
This research is still growing, and no single study tells the whole story. But I find it encouraging, because it lines up with what I see in my office every week. These changes aren't about chasing symptoms. They're signs of a body that's communicating better with itself.
Why the benefits show up in unexpected places
This is the part I find most interesting. The same issue of Coherence looked at cases ranging from infants to pregnant moms to adults with complicated health histories. Across very different people, practitioners reported improvements in the same kinds of areas: better sleep, easier digestion, a steadier mood, better coordination, and a greater ability to handle stress.
At first glance those don't seem connected. But they all depend on the same communication network. When the signals get clearer, the whole system can work better, not just the one spot that hurt.
The authors put it well: "Healing is not something we force. It is something we free." An adjustment isn't aimed at a symptom. It's aimed at helping your body communicate the way it was designed to, and then letting your body do what it does best.
A lot of today's research on long-term health looks at how well these systems work together, rather than at one organ at a time. The Haas review puts chiropractic into that same bigger-picture way of thinking about health.
What this means for you
When I adjust you, the goal isn't just to make a sore spot feel better. It's to help your nervous system get clearer information, so the rest of your body can respond the way it was designed to. That matters for the kids, pregnant moms and adults we care for.
A few things you can do to support your body's communication network:
Stay consistent with your adjustments. Your nervous system responds best to regular care, not just a visit when something hurts.
Manage stress. Sleep, time outside and a few slow, deep breaths during the day all help your body shift out of "fight or flight."
Keep moving. Movement is one of the richest sources of healthy input to your brain.
Feed your body well. Real food, plenty of water, and the vitamin D and omega-3s your body needs to keep inflammation in check.
The bottom line
Your spine protects the communication lines that run your whole body. Keeping those lines clear is what chiropractic is all about.
If you have questions about this, bring them to your next adjustment. I love talking about this stuff. And if it's been a while since we've seen you, book your next visit here.
Take it easy…but go take it!
Dr. Rob
Source: Haas A, Chung J, Kent C, Mills B, McCoy M. Vertebral Subluxation and Systems Biology: An Integrative Review Exploring the Salutogenic Influence of Chiropractic Care on the Neuroendocrine-Immune System. Annals of Vertebral Subluxation Research, 2025:1–42. Summary adapted from Coherence, Volume 26, Issue 1 (vertebralsubluxationresearch.com).
This article is for general education and isn't a substitute for personal medical advice. Chiropractic care is not a replacement for medical treatment of any disease.