By Dr. Drew Hall, Upper Cervical Chiropractor
If you’ve ever rolled over in bed and had the room suddenly spin, you may have been told you have BPPV — Benign Paroxysmal Positional Vertigo. It’s the most common cause of vertigo, and for most people, it has a well-understood mechanical cause: tiny calcium carbonate crystals called otoconia (often nicknamed “ear crystals”) come loose inside the inner ear and drift into one of the semicircular canals. When you move your head, those crystals shift and send a false signal to your brain that you’re spinning.
The standard treatment is the Epley maneuver — a series of head and body positions designed to guide the crystals back to where they belong. For a large number of patients, it works, and it works well. But for a surprising number of others, it doesn’t work at all, or it works for a while and the dizziness keeps coming back. This article looks at why that happens, and at a piece of the puzzle that mainstream vertigo treatment often overlooks entirely: the upper cervical spine.
How BPPV Actually Works — and How Well Epley Really Performs
BPPV happens when otoconia dislodge from the utricle, one of the inner ear’s balance organs, and end up in a semicircular canal — most often the posterior canal. Once there, gravity moves the crystals every time you tilt or turn your head, and that movement is misread by your vestibular system as if your whole body were spinning.
The Epley maneuver, also called the canalith repositioning procedure, is genuinely effective for this specific problem. Clinical studies consistently report cure rates in the 80–90% range after one to three treatments. That’s a strong success rate — but it also means a meaningful slice of patients don’t get full relief from the maneuver, and even among people who do respond, published recurrence rates run anywhere from about 10% to over 30% within a year or two of follow-up. Failure of the maneuver on a given attempt shows up in roughly 3–15% of cases, and neck stiffness or reduced cervical range of motion has specifically been associated with a higher chance of BPPV recurring and repositioning maneuvers failing.
So the honest clinical picture isn’t “Epley always works.” It’s “Epley works very well for true canalith-related BPPV, and there’s a recognized subset of patients who don’t fit that picture as cleanly as it looks on paper.”
The Brainstem: Where Balance Signals Actually Get Sorted Out
To understand why some “BPPV” doesn’t behave like textbook BPPV, it helps to understand where balance information is processed. The inner ear doesn’t determine whether you feel dizzy on its own — it sends signals to a cluster of nuclei in the brainstem called the vestibular nuclei. These nuclei are the switchboard for balance: they take in signals from the inner ear, from your eyes, and — critically — from proprioceptors in your neck, and they blend all of it into a single sense of where your head and body are in space.
This isn’t a fringe idea. The vestibulo-ocular reflex, the cervico-ocular reflex, and the cervico-collic reflex are all well-documented pathways showing that neck position sense and eye/head coordination are wired directly into the same brainstem circuitry that processes inner ear signals. Your upper neck — particularly the C1 (atlas) and C2 joints — carries one of the highest concentrations of proprioceptors anywhere in the body, because those joints have to constantly report exactly where your head is relative to your spine. That information converges on the same brainstem structures your inner ear reports to.
That convergence is exactly why neck-related dizziness and inner-ear dizziness can look and feel so similar — and why they get confused for each other clinically.
When Epley Doesn’t Work: A Second Cause Hiding Behind the First
Here’s where it gets clinically important. A condition called cervicogenic dizziness — dizziness driven by dysfunction in the cervical spine rather than the inner ear — is increasingly discussed in the research literature as a distinct entity, even though it remains a debated and exclusion-based diagnosis without a single definitive test. It’s described as arising from altered proprioceptive input from the neck creating a “sensory mismatch” with what the eyes and inner ear are reporting.
This matters for BPPV patients for a simple reason: many provocative positional tests move the head and the neck at the same time. A head-turning or head-tilting test doesn’t isolate the inner ear — it also moves the upper cervical joints. So a positive response to head movement doesn’t automatically confirm that crystals are the culprit. Researchers have developed tests like the cervical torsion test specifically to try to tease the two apart, by rotating the body while holding the head still so the neck moves but the inner ear doesn’t.
In practice, that distinction gets missed often. Someone gets diagnosed with BPPV, goes through the Epley maneuver, and either gets no relief or gets short-lived relief that returns within days or weeks. The natural assumption is “the crystals came loose again” — but an unaddressed upper cervical joint problem can produce a very similar symptom picture without a single misplaced crystal being involved.
Upper Cervical Dysafferentation: The Piece Mainstream Vertigo Care Often Misses
This is where upper cervical chiropractic care comes in. The theory of dysafferentation describes what can happen when the C1 (atlas) joint is misaligned: the proprioceptors in and around that joint no longer fire normally. Instead of sending accurate, well-timed signals about head position to the brainstem, a misaligned atlas can send aberrant, poorly calibrated signals into the very same vestibular nuclei that process inner ear input.
It’s important to be precise about what is established and what is proposed here. That the upper cervical spine is proprioceptively rich and feeds directly into brainstem balance centers is well-supported anatomy and neuroscience. That a misaligned atlas can generate abnormal (“dysafferented”) signaling into that shared circuitry is a mechanism proposed and discussed by upper cervical practitioners and researchers studying cervicogenic dizziness — it is a plausible, anatomically grounded explanation, but it is not universally accepted as settled science, and it should be understood as a working clinical model rather than an established fact in mainstream neurology.
Why This Can Create a False Positive for BPPV
Put those two things together and you get a scenario that plays out more often than most people realize:
A patient turns their head or rolls over in bed and feels dizzy. Clinically, that’s exactly what BPPV looks like. But there are two very different things that can cause dizziness with head movement:
- Loose otoconia crystals shifting inside a semicircular canal and sending a false spinning signal — true BPPV.
- Damaged or dysfunctional proprioceptors at the C1 joint, misfiring because of upper cervical misalignment, sending distorted position signals into the same brainstem pathways — a cervical mimic of BPPV.
Both can produce dizziness that’s triggered by moving the head. Both can show up during a Dix-Hallpike test, since that test moves the head and neck together. And because standard vertigo workups are built around the assumption that positional dizziness equals a crystal problem, the second cause frequently gets labeled and treated as BPPV — which is why the Epley maneuver, aimed squarely at the inner ear, doesn’t resolve it. There’s nothing wrong with the crystals to reposition, because the crystals were never the primary issue.
This is a major reason some patients bounce between repeat Epley attempts, ENT visits, and vestibular therapy without lasting relief. If the upper cervical spine is the true driver — or even a significant contributing driver alongside a genuine inner-ear component — addressing the inner ear alone will always leave part of the problem untouched.
The Upper Cervical Approach to Evaluating This
Because a misaligned C1 can mimic, worsen, or coexist with true BPPV, a thorough upper cervical evaluation is a reasonable step for anyone whose positional dizziness hasn’t responded the way it should to standard treatment. That evaluation typically involves:
- Specific testing to determine whether a misalignment is present at the craniocervical junction, using postural, neurological, and instrumentation-based analysis rather than guesswork.
- CBCT 3D imaging to precisely locate the exact pattern and direction of the misalignment, since the atlas can shift in several different directions and the correction has to match the specific pattern found.
- A gentle, precise correction — without popping, twisting, or yanking the neck — designed to restore normal alignment and, with it, more accurate proprioceptive signaling from the joint back into the brainstem.
- A focus on holding the correction, so the joint stabilizes in its corrected position and the patient isn’t left needing frequent repeat adjustments just to maintain relief.
This process is fundamentally different from a chiropractic “neck crack.” It’s a targeted, imaging-guided correction of a single joint relationship at the top of the spine, aimed specifically at the area of the nervous system most responsible for feeding accurate position sense into the brainstem’s balance centers.
The Bottom Line
BPPV is real, common, and usually very treatable — the Epley maneuver has a strong track record for genuine canalith displacement. But when positional dizziness doesn’t fully resolve, or keeps coming back despite a technically successful maneuver, it’s worth asking whether the upper cervical spine is playing a role. A misaligned atlas can generate the same kind of movement-triggered dizziness that crystals do, through a completely different mechanism — and no amount of repositioning otoconia will fix a proprioceptive signaling problem at the C1 joint.
This article is for educational purposes only and is not intended as a substitute for professional medical advice, diagnosis, or treatment. Vertigo and dizziness can have serious underlying causes, and anyone experiencing these symptoms should be evaluated by a qualified healthcare provider.