When your neck will not hold
What this usually feels like
People describe it in their own words long before anybody gives it a clinical name. That their neck will not hold. That their head feels heavy, or that holding it up is work by the afternoon. That something gives way when they turn. Some people say bobblehead and mean it fairly literally.
It often changes with position and with the time of day. It is often worse when upright, worse when looking down, and better lying down. And it is very often accompanied by a folder of imaging and the sentence that everything came back normal.
The clinical names for what is being described here are cervical instability and hypermobility.
What is down there
The neck carries the weight of the head on a small stack of vertebrae, and what stops that stack sliding around is soft tissue: ligaments running between the segments, joint capsules, and the deep muscles that hold position without you thinking about it. Bone gives the structure its shape. Connective tissue gives it its control.
When that connective tissue is stretched, damaged or simply lax, the bones can still look perfectly well formed and well positioned while the control between them is not what it should be.
Why the standard workup can come back clean
Because the standard workup asks a still question. An MRI or a plain film taken with you holding one position is an excellent way to find the things that are there whether you move or not, and a poor way to find a segment whose problem only appears while it is moving under load.
A joint that holds at rest and gives way under load looks entirely normal at rest. Nobody missed anything. The study was answering a different question.
What motion imaging and dynamic ultrasound can add
Digital Motion X-Ray records the cervical spine on video while it actually moves, so each segment can be watched through its range rather than inferred from a single frame. What that adds here specifically is the ability to see how a segment behaves at the part of the range where symptoms appear, rather than at the part of the range where you happened to be lying when the picture was taken.
Diagnostic ultrasound performed lying down, seated and standing adds the position dimension, because some findings appear in one position and disappear in another.
That is a statement about what each method can see. It is not a claim that your previous imaging missed something. We have not examined you and we do not know.
This is not always structural
Plenty of things produce this pattern and are not a cervical stability problem. Inner ear disorders, blood pressure and autonomic conditions, medication effects, generalised connective tissue disorders that need a geneticist or a rheumatologist rather than a chiropractor, thyroid and metabolic causes of fatigue and heaviness, and anxiety, which is real and which also genuinely produces physical symptoms.
If you have new neurological signs, weakness in your arms or legs, changes in your speech, swallowing or vision, or symptoms that came on suddenly after trauma, be assessed urgently by a physician before you consider anything on this page.
How you would find out
You would be examined first, and you would go through your history properly, including everything that has already been tried and every study you have already had. If what that turns up supports it, motion imaging and diagnostic ultrasound come next. Then you sit down and go through the findings together.
If the finding is a stability problem, there is more than one route back, and they run from surgery at the most invasive end through deeper ligament injections, curve correction, and connective tissue dry needling. Those four routes are laid out here. Which of them applies is not something anyone can tell you before examining you.
Common questions
Why did my MRI come back normal if my neck feels unstable?
Most standard imaging is taken with you still, in one position, for one moment. A segment that holds well at rest and gives way under load can look entirely normal in that state. It is not a failure of the radiologist, it is a property of the question the study was designed to answer.
What is the difference between hypermobility and instability?
Hypermobility describes a joint that moves further than typical. Instability describes a segment that does not control that movement well under load. They overlap and they are not the same thing, and telling them apart is part of what an examination is for.
How would I find out what is actually going on?
By being examined, and by looking at how the segment behaves while it moves rather than only while it is still. That usually means a physical examination first, and then Digital Motion X-Ray and diagnostic ultrasound if the findings call for them.
Start with the quiz if you are not sure this is you. It takes about 90 seconds, nothing is booked and nothing is charged. If you would rather talk to somebody first, the discovery call is free.