Cervical radiculopathy after injury
Arm pain that follows a map is one of the few pain complaints that can be checked against a diagram.
Cervical radiculopathy is arm pain with sensory, motor or reflex change from an injured nerve root in the neck. After a crash it is common in an already-degenerated neck, because a narrowed foramen has no reserve for a small traumatic change.
A compressed or irritated cervical nerve root produces symptoms in a distribution that is anatomically predictable. That predictability is what makes it corroborable — the examination, the imaging and the electrodiagnostic study either agree on a level or they do not.
Why it corroborates well
Each cervical root supplies a defined area of skin, a defined set of muscles and a defined reflex. A C6 problem does not produce a C8 pattern. When the reported symptoms, the sensory examination, the motor examination, the reflexes, the imaging level and the electrodiagnostic findings all point at the same root, that convergence is not something a patient can construct.
The North American Spine Society guideline sets out the evidence base for diagnosis and treatment of cervical radiculopathy from degenerative disorders, including the role and limits of each diagnostic modality.
The traumatic-versus-degenerative question
Most adults over forty have some cervical degeneration, so a reviewing expert will attribute the radiculopathy to it. The answer is the same as elsewhere: base rates make the finding uninformative on its own, and what carries the opinion is the documented change — new distribution, new deficit, new functional loss, dated.
Reserve space matters here more than almost anywhere. A foramen already narrowed leaves no margin for post-traumatic swelling or a small disc protrusion, which is the eggshell argument in anatomical form.
What we would test
- Examination first, mapping the deficit to a root.
- Imaging reviewed against that map rather than before it.
- Electrodiagnostics once enough time has elapsed, understanding that a normal study does not exclude a sensory radiculopathy.
- A diagnostic selective nerve root block where the level remains in question.
This practice is not aligned to a side. Its obligation runs to the patient’s health and safety, which is the same reason it is not beholden to any position that would keep it from seeing what is actually there. We do not offer opinions on liability, we do not accept a referral or a review conditioned on reaching a particular conclusion, and we will say plainly when the evidence does not support the claim — whichever party was hoping otherwise.
Common questions
Can a crash cause radiculopathy in a degenerated neck?
That is the ordinary presentation. A narrowed foramen has no reserve, so a small traumatic change produces symptoms it would not produce in a roomier spine.
Does a normal EMG rule it out?
No. Purely sensory radiculopathy is frequently electrodiagnostically silent — see EMG and nerve conduction.
What if the imaging level does not match the symptoms?
Then the imaging finding is probably not the generator, and saying so protects the rest of the opinion — see imaging and correlation.
Is surgery the endpoint?
Not usually, and surgical candidacy is a separate question decided on deficit and progression rather than on pain alone.
Related reading
- Whiplash and cervical injury
- EMG and nerve conduction
- Imaging and correlation
- The eggshell plaintiff
- “Pre-existing degeneration”
Send the symptom map with the imaging
The question is whether they agree on a level. That is answerable.
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Sources
- Bono CM et al. An evidence-based clinical guideline for the diagnosis and treatment of cervical radiculopathy from degenerative disorders. The Spine Journal, 2011. PubMed 21168100
- Dillingham TR et al. Evaluation of persons with suspected lumbosacral and cervical radiculopathy: electrodiagnostic assessment and implications for treatment and outcomes. Muscle & Nerve, 2020. PubMed 32564381
- Brinjikji W et al. Systematic literature review of imaging features of spinal degeneration in asymptomatic populations. American Journal of Neuroradiology, 2015. PubMed 25430861
- Cohen SP et al. Consensus practice guidelines on interventions for lumbar facet joint pain from a multispecialty, international working group. Regional Anesthesia and Pain Medicine, 2020. PubMed 32245841