Overview
Most X-rays show you what the spine looks like when it’s still. Motion study X-rays show you what it’s doing when it moves — and that distinction changes everything about how we understand and treat spinal problems.
At Dow Chiropractic in Madison, motion study X-rays using Pennings Analysis are the starting point for every corrective care plan. They’re not just a diagnostic tool — they’re the blueprint.
What Pennings Analysis reveals
Standard X-rays capture a single static position. Pennings Analysis evaluates the spine through a range of motion — showing which vertebrae are moving freely and which ones are stuck.
That distinction is clinically significant. It’s generally the stuck vertebrae — the ones that have lost normal movement — that are creating the symptoms. A static X-ray can show that a vertebra is out of position. A motion study shows that it isn’t moving. Those are different problems requiring different approaches.
Once we identify which segments are restricted, we correlate that with the nerve chart — mapping which spinal levels connect to which organs and body systems. A stuck vertebra at a specific level isn’t just a local mechanical problem. It’s a disruption in the nerve communication between the brain and whatever that level serves. That correlation tells us not just where the structural problem is, but what it may be affecting downstream.
Movement is how the body sees itself
Think about how the body responds to being sedentary. When you stop moving, things get worse — stiffness increases, circulation decreases, recovery slows. The same principle applies to individual vertebrae. Bones that move freely function better. Bones that are stuck create problems that extend well beyond local pain.
Movement is also part of how cells communicate. Cell signaling — the process by which cells detect and respond to what’s happening around them, including immune threats — depends partly on mechanical motion. A vertebra that isn’t moving isn’t just causing local nerve interference. It’s contributing to a broader disruption in how parts of the body sense and respond to each other.
This is one reason why restoring spinal motion — not just spinal position — produces systemic effects that go beyond what patients expect from chiropractic care.
What we measure and track
Before beginning corrective care, Dr. Dow counts the number of subluxations visible on the motion study — quantifying the degree of restriction present and establishing a precise baseline.
After the intensive phase of the treatment plan, we retake the X-rays. The comparison shows measurably increased motion, improved overall flexibility, and identifies which areas still need focus. Progress is documented and visible — not just reported by the patient.
Motion study X-rays also reveal excessive motion and instability from ligament damage — hypermobility that standard X-rays miss entirely. This is particularly relevant for patients with whiplash, past trauma, or chronic instability that hasn’t been properly identified.
A useful baseline — even before injury occurs
One of the underappreciated uses of motion study X-rays is establishing a baseline before an injury happens. Patients who have a documented record of their normal spinal motion have a significant advantage if they’re ever involved in an accident or sustain a traumatic injury — because we can compare directly to their pre-injury state rather than estimating what normal looked like for them.
How this connects to your care plan
The findings from your motion study X-rays directly inform every aspect of corrective care — which techniques are used, which segments receive focused attention, what your home CBP spinal molding protocol looks like, and how progress is measured over time.