Normal MRI but Still Dizzy? Here's What Wasn't Checked

Key Takeaways

• A brain MRI is designed to rule out tumors, strokes, lesions, and demyelinating disease — it was not designed to measure upper cervical alignment.
• The atlas and axis sit at the craniocervical junction, enclosing the brainstem, vertebral arteries, and CSF pathways; misalignment there can go undetected on standard imaging.
• Research published in peer-reviewed literature notes there is no single standardized test to confirm cervicogenic dizziness, and diagnosis relies on clusters of clinical features after other causes are excluded.
• Blair-protocol imaging — including Cone Beam CT — is taken along each patient’s own joint angles to reveal asymmetric joint geometry that standard MRI slices through without flagging.
• If an examination finds nothing to correct at the upper cervical spine, we will say so and point you toward care that can help.

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Sudden or severe dizziness, especially with new headache, double vision, difficulty speaking, weakness, or loss of coordination, can indicate a condition that needs urgent medical attention. Call 911 or go to an emergency department. Do not wait for a chiropractic appointment.

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Your MRI was normal. You are still dizzy every day.

“My MRI came back completely normal, but I’m still dizzy every day — and nobody can tell me why.”

That sentence lands in a particular way when you have already sat in a specialist’s office, handed over the films, and been told everything looks fine. The reassurance does not match the wall you have been holding at night. It does not explain why you turned down plans last week because you were afraid it would happen in public.

A clear MRI is real information. It matters. It means nobody missed a tumor, a stroke, or a demyelinating lesion. That is not a small thing, and the neurologist who ordered it was doing exactly what a neurologist should do.

What it does not mean is that every possible cause of dizziness has been examined.

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What the MRI was designed to find — and what it was not

Standard brain MRI sequences are built to detect soft tissue pathology: masses, infarcts, white matter changes, vascular anomalies large enough to appear on a slice. They do this reliably. They are not built to measure the alignment of the top two vertebrae against each other, and they are not taken at the specific angles that would show how those joints actually sit.

The atlas — the first cervical vertebra — and the axis beneath it form the craniocervical junction. The brainstem passes through this space. The vertebral arteries run along it. The cerebrospinal fluid pathways are here. If the atlas has shifted relative to the occiput or the axis, standard imaging typically slices through that area without flagging it as abnormal, because the software and the radiologist are looking for something else.

This is not a failure of the MRI. It is a description of what it was designed to do.

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The neck’s role in dizziness — what the research says

The connection between the upper cervical spine and dizziness is documented in peer-reviewed literature, though the picture is still being worked out.

A narrative review published in Frontiers in Neurology describes the mechanism plainly: the upper cervical spine is dense with proprioceptive fibers — sensory receptors that report head and neck position to the brain. Those signals travel directly to the vestibular nucleus, the structure that integrates balance information. When the upper cervical proprioceptors send disrupted or aberrant signals, the vestibular system may generate an inaccurate sense of where the head is in space, producing dizziness.¹

A case report in Dove Medical Press describes the same pathway: disrupted mechanical input and aberrant pain signals from the neck can result in “an inaccurate depiction of head and neck orientation in space, which leads to dizziness.”²

The peer-reviewed literature is candid about the diagnostic challenge. A paper in the Journal of Medical Cases notes there is no standardized test for cervicogenic dizziness.³ A systematic review cited in the Frontiers in Neurology narrative review found that the most consistent diagnostic criteria rely on the co-occurrence of neck pain and dizziness after other causes have been excluded.¹

That last phrase matters. This is not a diagnosis of first resort. It is what you consider when the standard workup has been completed and the tests have come back normal.

Blair Upper Cervical care addresses vertebral subluxation. It is not intended to diagnose, treat, cure or prevent any disease or condition. Individual patient results vary.

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What Blair imaging actually looks for

This is where the examination differs from anything you have likely had before.

Dr. William G. Blair’s central insight was that upper cervical joints are not the same from person to person. The angles at which the atlas meets the occiput — and the axis meets the atlas — are individual. Because of that, imaging taken at a standard angle will show those joints through bony overlap that obscures the actual joint margins. You cannot measure what you cannot see clearly.

Blair-protocol imaging corrects for this. Either specialized upper cervical radiography or Cone Beam CT (CBCT) is used. CBCT shows the joints in three dimensions at a radiation dose comparable to or lower than a conventional cervical X-ray series. The scout series establishes each patient’s individual joint angles. Then Blair Oblique Protractoviews are taken along those specific angles using a Protracto clamp — so the imaging is literally oriented to your anatomy, not to a population average.

Analysis of those images determines whether each joint margin is juxtaposed, overlapped, or underlapped. That produces a specific listing: a description of exactly where the misalignment is and in what direction. The correction is then calculated from that listing. There is no standard Blair adjustment, because no two people’s joints are alike.

Before any of that imaging, a paraspinal thermographic scan is performed — a handheld dual-probe infrared instrument that reads left-to-right heat differentials along the spine. A persistent, repeatable side-to-side difference indicates nerve interference. That pattern is confirmed across separate visits, because a single reading cannot distinguish a fixed pattern from normal variation.

The adjustment itself is by hand, in a side-posture position with a drop headpiece. No rotation of the neck. No twisting. No cracking or popping.

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What care looks like over time

After the adjustment, you rest. The correction needs time to settle before activity.

You are not re-adjusted while the correction is holding. That is a principle, not a convenience. The goal is for the atlas to stay where it belongs. Follow-up imaging around four to eight weeks confirms whether it has. If the correction is holding, there is nothing to do. The visits are fewer precisely because we are not adjusting you on a schedule — we are checking whether you need to be adjusted at all.

A 2024 review of upper cervical technique studies in PubMed Central found case reports and small series describing improvement in dizziness symptoms following upper cervical intervention, while noting the evidence base remains limited and that the relationship between upper cervical dysfunction and dizziness is an active area of investigation.⁴

If the examination finds no misalignment to correct, we will tell you. A clear result here means something different from a clear MRI — it means we have looked at the specific thing we are trained to look for, and it is not there. That is useful information, and it points toward what to pursue next.

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Blair Upper Cervical care addresses vertebral subluxation. It is not intended to diagnose, treat, cure or prevent any disease or condition. Individual patient results vary.

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FAQ

Why doesn’t a regular MRI show upper cervical misalignment?

Standard MRI sequences are designed to identify soft tissue pathology — tumors, infarcts, lesions. The imaging is not taken along the individual joint angles of the atlas and axis, so the joint margins are often obscured by bony overlap. Blair-protocol imaging is specifically oriented to each patient’s own joint geometry, which is why it can reveal misalignment that standard imaging does not flag.

What is cervicogenic dizziness?

Cervicogenic dizziness is a clinical syndrome in which dizziness arises from dysfunction in the neck rather than the inner ear or brain. Peer-reviewed literature describes the proposed mechanism as disrupted proprioceptive signals from the upper cervical spine reaching the vestibular nucleus and producing an inaccurate sense of head position. There is no single definitive test for it; diagnosis relies on clinical features and the exclusion of other causes.

Do you use any instruments to adjust, or is it all by hand?

The Blair adjustment is by hand — pisiform contact, side posture, drop headpiece. No instruments are used for the adjustment itself. The imaging that precedes it uses either specialized upper cervical radiography or Cone Beam CT. The thermographic scan uses a handheld dual-probe infrared instrument to read paraspinal heat differentials.

What if the examination finds nothing to correct?

If the thermographic pattern analysis and imaging show no misalignment at the upper cervical spine, we will say so. We will not adjust you and we will point you toward whatever next step makes sense for your situation. Finding nothing to correct is a result, not a failure.

Is this approach safe?

Low-force upper cervical care — which involves no rotation, no twisting, and no high-velocity thrust to the neck — has a strong safety record in the available literature. Serious adverse events are very rare. If there is any clinical indication of instability, fracture, or a condition outside the scope of chiropractic, you will be referred out before any adjustment is performed.

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One next step

If you have been through the standard workup and the tests are normal, there is one thing that likely has not been examined: the alignment of your atlas and axis at the craniocervical junction.

A focused examination can tell you whether that is relevant to what you are experiencing. If it is not, we will say so.

Schedule an examination at Health First

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Footnotes

1. Proprioceptive Cervicogenic Dizziness: A Narrative Review of Pathogenesis, Diagnosis, and Treatment. Frontiers in Neurology. https://pmc.ncbi.nlm.nih.gov/articles/PMC9655761 ↩ ↩²

2. Cervicogenic Dizziness in an 11-year-old girl. Dove Medical Press. https://www.dovepress.com/cervicogenic-dizziness-in-an-11-year-old-girl-a-case-report-peer-reviewed-fulltext-article-AHMT ↩

3. Cervicogenic Dizziness Associated With Craniocervical Instability. Journal of Medical Cases. https://www.journalmc.org/index.php/JMC/article/view/3792/3148 ↩

4. Atlas Subluxation Complex, National Upper Cervical Chiropractic Association. PubMed Central. https://pmc.ncbi.nlm.nih.gov/articles/PMC11927947 ↩