Orthopedics · Part Three · The Spine as a System
Lesson 24 / 44
Three Headaches, One Neck: Telling Cervicogenic Headache From Tension-Type and Migraine
Three headaches can feel almost identical, yet only one is truly driven by the neck. Learning to tell them apart is where careful conservative care begins.
Cervicogenic headache is head pain generated by a disorder of the cervical spine, and it is the least common of the three headaches that look alike at the bedside. Tension-type headache runs near 26 percent worldwide and migraine near 14 percent, while cervicogenic estimates sit between 0.4 and 4.1 percent. Neck pain accompanies all three, so it never settles the question. The Unified Model of Tone reads the convergence that produces referred head pain as the rule at the first relay, not a quirk of the neck.
Global prevalence, tension-type headache against migraine
26.0 percent against 14.0 percent
Cervicogenic headache in a whole-population examination
4.1 percent of 1,838 residents
C1 to C2 share of maximal cervical rotation
40.5 degrees of 72.2
Cervical flexion-rotation test, sensitivity and specificity
91 percent and 90 percent
Cervicogenic headache
Head pain referred to the head from a source in the cervical spine. It is a secondary headache, which means the diagnosis names a generator outside the head itself. The pain is typically one sided without shifting sides, begins in the neck or occipital region, and is provoked by neck movement or sustained posture. Remove the cervical disorder and the headache goes with it.
The trigeminocervical complex
The caudal end of the trigeminal nucleus runs down into the dorsal horn of the upper cervical cord and merges with it. Nociceptive fibers from the C1, C2 and C3 nerves land on the same second order neurons that receive fibers from the first division of the trigeminal nerve. A single cell can hold one receptive field on the forehead and another on suboccipital muscle.
01One neck, three patterns
Cervicogenic headache is the only one of the three the neck actually generates
Cervicogenic headache is the one headache truly caused by the neck, and telling it apart from tension-type headache and migraine is the most consequential question a clinician answers about head pain. All three can throb behind the eyes, tighten across the forehead, and travel up from the base of the skull. They arise from very different machinery.
The distinction is one of category. A primary headache belongs to the nervous system itself. A cervicogenic headache belongs to the cervical spine, and without the neck problem the headache would not exist at all. That single fact sets what conservative care can reasonably address, and it explains why the neck deserves a careful physical examination rather than a guess.
The epidemiology fixes the base rate. A review of 357 prevalence publications put tension-type headache at 26.0 percent of the world population and migraine at 14.0 percent (Stovner 2022).
How common the neck-driven headache actually is
Cervicogenic headache sits far below both. A whole-population study in Vaga, Norway examined 1,838 residents and found 4.1 percent meeting the Cervicogenic Headache International Study Group criteria (Sjaastad 2008). A critical review put the range at 0.4 to 2.5 percent of the general population, rising to 15 to 20 percent among patients with chronic headache (Haldeman 2001).
Those figures disagree because the criteria and the denominators disagree. What they share is a ceiling. The neck is blamed for headache far more often than any of these estimates support, which is the practical reason to hold the criteria strictly.
One question precedes all three. Any careful headache assessment begins by excluding the secondary causes that need urgent attention. When a Headache Is Dangerous carries the red flags and the decision rules, and Migraine vs Seizure separates aura from seizure semiology by time course. The reasoning below begins once those questions are settled.
02Findings
What the research shows
From a global prevalence review, two population studies, two animal recording series, three clinical accuracy studies and a controlled block series.
03Where neck meets head
The trigeminocervical complex is what lets a neck joint produce pain in the forehead
The trigeminocervical complex is the anatomical bridge that lets a neck joint create pain felt across the forehead. In this relay, nociceptive fibers from the C1, C2 and C3 spinal nerves converge onto shared second order neurons. Those same neurons receive fibers from the first division of the trigeminal nerve. Because the signals share one channel, the brain cannot always tell whether a message came from an upper cervical joint or from the face.
Upper cervical pain is therefore referred forward into the frontal, orbital and parietal regions the trigeminal nerve normally serves. Bartsch and Goadsby recorded the arrangement directly. Of 67 neurons sampled in the C2 dorsal horn, 52 were wide dynamic range cells and 15 were nociceptive specific. Every one answered to stimulation of both the supratentorial dura and the greater occipital nerve (Bartsch 2002).
Applying the C-fiber activator mustard oil to suboccipital muscle raised the excitability of dural responses in 9 of 10 neurons tested, and did so for significantly longer than the same stimulus applied to skin. The tissue that reports neck position drove the relay harder than the tissue covering it.
The convergence runs in both directions
The traffic is not one way. When the same investigators applied mustard oil to the dura instead, mechanical thresholds of the dura fell. Seventy-one percent of the recorded neurons enlarged their mechanoreceptive fields into trigeminal and cervical territory, and responses to noxious stimulation of deep paraspinal muscle rose (Bartsch 2003).
A migraine can therefore manufacture neck tenderness through the same shared neurons that let a neck joint manufacture forehead pain. The tender neck of an attack is often a product of the headache rather than its source.
Population data agrees. Among 797 people interviewed, one-year neck pain prevalence was 85.7 percent in those with a primary headache against 56.7 percent in those without, and 76.2 percent in pure migraine (Ashina 2015). The presence of neck pain alone never confirms a cervicogenic diagnosis.
04What the history tells first
History separates the three headaches before any test is performed
History reveals more about a headache than almost any other single tool. Lifelong headache sufferers usually carry a primary disorder that began early in life. The cervicogenic pattern typically starts after a neck injury in someone who was never a headache person before.
Cervicogenic headache tends to be unilateral without shifting sides. It is aggravated by sustained posture and neck movement, and comes with tender upper cervical structures and weak deep neck flexors. Tension-type headache is usually bilateral, a pressing head in a vice quality, and is not provoked by neck movement.
Migraine sits at the far end of the same spectrum, reflecting broader disturbance across brainstem nuclei, the hypothalamus and autonomic systems. The neck is one territory among several that an attack recruits. Total pericranial tenderness scores averaged 15.1 of a possible 48 in people with neck pain against 8.4 in people without (Ashina 2015).
The Sjaastad criteria and what they leave open
The Cervicogenic Headache International Study Group set out the criteria that carry Ottar Sjaastad’s name. They are unilaterality of head pain, reduced range of movement in the neck, ipsilateral shoulder or arm discomfort, and mechanical provocation of similar pain judged objectively or by report (Sjaastad 2008).
The Vaga series shows what those criteria capture. Among the 41 cases meeting the highest number of them, exacerbations began in the neck or occipital region in 97 percent, and migraine traits such as nausea and throbbing were rarely present. That series found a female to male ratio of 0.71. A review of the wider literature instead reports a 4 to 1 female disposition and a mean age of 42.9 years (Haldeman 2001).
That same review found no imaging finding that correlates with the diagnosis. Cervicogenic headache is identified by pattern and provocation rather than by a picture, and Why MRI Misleads follows what happens when a scan is asked to settle a question the history has not narrowed.
The neck contributes to a great many headaches, and contribution is not causation. Deciding whether the neck is merely a trigger or the actual source is one of the most important judgments in all of headache care. Recognizing which story a person is telling frames the whole plan, and it does so without a single image.
05Testing the segment
The flexion-rotation test isolates C1 to C2, and no single test carries the diagnosis
The cervical flexion-rotation test isolates the one segment most tied to cervicogenic headache. More than half of all cervical rotation originates at the C1 to C2 joint. A CT study of maximal head rotation in normal subjects measured a mean of 40.5 degrees there. The eight segments from occiput to the first thoracic vertebra summed to 72.2 degrees (Penning 1987).
No other level came close. The next largest contribution was 6.9 degrees at C5 to C6, and the occiput to C1 joint gave 1.0 degree. Fully flexing the neck first takes the lower segments toward end range and leaves upper cervical rotation exposed.
When rotation is clearly restricted in that flexed position, it points toward the upper cervical dysfunction that drives cervicogenic headache. One blinded comparison tested 23 people with cervicogenic headache, 23 asymptomatic controls and 12 people with migraine with aura. Sensitivity was 91 percent and specificity 90 percent, for an overall accuracy of 91 percent (Ogince 2007).
Reproducing a person’s familiar headache by pressing over the C2 to C3 joint adds further confidence, because that referral traces directly back through the trigeminocervical complex.
Three findings together, not one
No single maneuver stands alone. The flexion-rotation test examines the C1 to C2 segment well and does not assess every upper cervical structure, so it is combined with movement assessment and muscle control testing. Jull and colleagues added manual segmental examination, flexor and extensor strength, the craniocervical flexion test, extensor cross-sectional area at C2 and cervical kinesthetic sense.
The sample was 73 community volunteers with a single classifiable headache, 18 of them cervicogenic, plus 57 controls. Restricted movement, palpable upper cervical joint dysfunction and impaired craniocervical flexion, taken together, identified cervicogenic headache with 100 percent sensitivity and 94 percent specificity (Jull 2007).
None of those impairments appeared in the migraine or tension-type groups. The authors reported the figures and left open whether the pattern predicts the diagnosis prospectively. One discriminant analysis in 73 people is a strong signal and not a settled instrument.
What the examination cannot see
Some neck-driven headache is invisible to every physical test. Lord and colleagues blocked the third occipital nerve under double blind control, twice and in random order, in 100 patients with chronic neck pain after whiplash. Third occipital nerve headache was present in 27 percent of the series and in 53 percent of those whose headache dominated (Lord 1994).
No feature of history or examination identified those patients beforehand, though they were significantly more likely to be tender over the C2 to C3 zygapophysial joint. Pattern recognition, not one test, carries the diagnosis. Pattern recognition also has a floor, and knowing where it sits is what makes referral for a diagnostic block a considered step rather than a concession.
06Claims removed from this page
Four figures from the earlier version were replaced
The earlier version put tension-type headache at roughly 40 percent of people and migraine near 10 percent, with no source attached. The pooled estimates are 26.0 and 14.0 percent (Stovner 2022). It also described cervicogenic headache as 2.5 to 4 percent of headache sufferers, which mixes two different denominators. The published figures are 0.4 to 2.5 percent of the general population, 4.1 percent in one whole-population examination, and 15 to 20 percent among chronic headache patients.
A claim that up to 74 percent of people with frequent headache or migraine also describe neck pain could not be matched to a source and came off. The measured figures run higher, at 85.7 percent in primary headache and 76.2 percent in pure migraine (Ashina 2015). The phrase very high accuracy for the three-item cluster was replaced by the reported sensitivity and specificity from the single study that produced them.
The statement that trials of chiropractic care report meaningful reductions in headache frequency, intensity and duration also came off. The trial numbers themselves are more specific and less uniform than that summary, and they appear below.
07The smart first step
Conservative care is the least invasive input that can carry the message, and the trials sort by headache type
When the neck is the genuine driver, conservative care is the smart first step. Gentle cervical manual therapy aims to quiet the nociceptive traffic feeding the trigeminocervical complex, lowering the input the brain refers forward as head pain. Because the mechanism is neurological rather than merely mechanical, calming upper cervical input reaches a headache that no amount of forehead attention would.
The dose-response trial is the most informative one available. Haas and colleagues randomized 256 adults with chronic cervicogenic headache to 0, 6, 12 or 18 sessions of spinal manipulation over six weeks, with focused light massage filling the unassigned visits. Headache days per four weeks fell by about one for every six additional visits, a linear relationship holding at every follow-up point (Haas 2018).
At the highest dose of 18 visits, cervicogenic headache days fell from about 16 to 8 per four weeks, roughly 3 days better than the control group at the primary end points. Headache intensity showed no important improvement and did not differ by dose. Frequency moved and intensity did not, which is a more useful result than any summary of it.
What the same input did in tension-type headache
Tested against episodic tension-type headache, the same input produced nothing. Bove and Nilsson randomized 75 adults meeting International Headache Society criteria to soft tissue therapy with spinal manipulation or soft tissue therapy with a placebo laser. All received eight treatments over four weeks from the same clinician (Bove 1998).
There were no significant differences between the groups on daily headache hours, pain intensity or analgesic use. Both groups improved. Daily headache hours fell from 2.8 to 1.5 in the manipulation group and from 3.4 to 1.9 in the control group by week 7, and those changes held. The authors concluded that as an isolated intervention, spinal manipulation does not appear to help episodic tension-type headache.
Management is therefore matched to the pattern rather than applied uniformly. Cervicogenic headache favors restoring upper cervical mechanics and deep flexor control. Tension-type headache is approached through load and trigger reduction rather than segmental correction, which is what the isolated manipulation trial supports. Migraine calls for the gentlest and most graded input, since an already sensitized system can be overwhelmed by too much.
Across all three, the goal is not to chase the pain but to reduce the load on a protective nervous system and give it room to settle. Escalation follows the same logic. When Conservative Care Stops sets the thresholds, and a referral is the correct larger dose rather than a failure of the smaller one.
08The model on headache and the neck
What the Unified Model of Tone claims about the three headaches
Everything above is established science, including the trial that came back null. What follows is our model’s reading, stated as ours rather than drawn from the papers cited.
Trigeminocervical convergence is usually taught as a curiosity of the head and neck, the reason a cervical joint can hurt in the forehead. Our model reads it the other way around. Convergence is the general rule at the first relay into the central nervous system, and the upper cervical region is simply where the rule is easiest to demonstrate. Referred pain exists because at that relay the neurons are the same ones.
That reading changes what the three headaches are. Each is a different organization of one relay. In cervicogenic headache the peripheral cervical drive dominates, which is why 18 visits of a segmental input moved headache days from 16 to 8 (Haas 2018). In tension-type headache the relay’s own gain dominates, which is why the same segmental input changed nothing (Bove 1998). In migraine the whole regulatory state dominates, hypothalamus and autonomic outflow included.
The suboccipital route to the dura
The second half of the bridge is mechanical. The dura anchors at the foramen magnum, dorsally to the posterior arches of the atlas and axis, and again at the sacrum. The suboccipital tissues attach into that same membrane, which makes a held pattern of suboccipital tension a held pattern of dural tension.
Our model reads that chain as a route from neck tissue to intracranial structures requiring no pinched nerve at any point. The recording data is its physiological signature. Chemical stimulation of suboccipital muscle raised the excitability of dural afferent input in 9 of 10 neurons, and did so for significantly longer than skin stimulation (Bartsch 2002).
The upper cervical region is built to report position rather than to produce force, which is why its afferent traffic arrives at the relay with such weight. The Neck as a Sensory Organ carries the spindle density figures behind that claim.
The prediction
From that follows a claim the headache literature does not make. Our model predicts that the three diagnostic labels will not partition the measurements cleanly. Four readings recorded together in the same people will share one underlying factor rather than varying independently.
The four are cervical flexion-rotation range in degrees, pressure pain threshold over the upper cervical joints, the total pericranial tenderness score out of 48, and recovery time after a sustained-posture load. Our model further predicts the direction of change under an input that restores regulation. People who begin with a high threshold and people who begin with a low one both move toward the middle, and the spread narrows.
This is a claim about how headache is organized rather than a claim about what treatment does. If cervical flexion-rotation range, pressure pain threshold over the upper cervical joints, total pericranial tenderness score and recovery time after a sustained-posture load are shown to move together, the unification claim is confirmed.
09The tone reading
How the three headaches express tone
Every topic in this library expresses all of tone. In the three headaches, three aspects carry the signature, because one relay receives the neck and the head on the same cells.
Coupling
Neck and head share one relay. Of 67 recorded C2 neurons, cells answered to both the dura above and the greater occipital nerve below.
Gain
The relay amplifies what it forwards. After dural stimulation, 71 percent of trigeminocervical neurons enlarged their receptive fields into cervical skin and muscle.
Input quality
The upper neck reports position. Restricted rotation at C1 to C2, where 40.5 of 72.2 degrees live, degrades the stream the relay reads.
The remaining foundations run through headache as well. Constraint: guarding the neck narrows the motion available, and the narrowing feeds the relay it was meant to protect. Time course: the cervicogenic pattern begins after an injury, while the primary headaches usually begin early in life. Set point: the resting level of protection decides how much cervical input it takes to produce head pain. Load: sustained posture provokes cervicogenic headache because accumulated demand crosses the threshold that a single movement does not. Prediction: an attack anticipated on schedule arrives more readily than the same input met without expectation. Oscillation: migraine keeps a period, and a headache that follows a cycle is reporting the regulator rather than the tissue. These are readings of one organization rather than separate systems, which is the core claim of the Unified Model of Tone.
10Across the library
How this page relates to the rest of the library
The convergence taught here is the mechanism several neighboring pages depend on.
The spindle density and kinesthetic data behind the claim that the upper neck reports position first.
Convergence generalized past the head, and what a nervous system holding a protective state looks like.
The jaw reaches the same relay, which is why jaw pain and upper neck pain are read as one pattern.
The secondary headache red flags that are excluded before any of this reasoning begins.
Aura against seizure semiology, sorted by time course rather than by the appearance of the episode.
The nuclei that house the trigeminocervical relay, and what else they regulate on the way through.
Headache read as a regulatory state, with the instruments used to measure it.
11Frequently asked
Questions patients ask about headache and the neck
Can neck problems cause headaches?
Yes. Cervicogenic headache is head pain generated by a disorder of the cervical spine, and it disappears when the cervical disorder is resolved. Neck dysfunction can also feed tension-type headache and migraine through shared brainstem pathways without being their cause. Recordings from 67 neurons in the upper cervical cord found cells answering to both the covering of the brain and the greater occipital nerve. That convergence is the anatomy that allows a neck structure to produce pain felt across the forehead.
How do clinicians tell whether a headache is coming from the neck?
By pattern rather than by any single finding. A clinician weighs the history, looking for onset after a neck injury in someone who was not previously a headache sufferer, one sided pain that does not shift, and provocation by sustained posture. Examination adds the cervical flexion-rotation test, palpation of the upper cervical joints, and craniocervical flexor control. Those three physical findings together identified cervicogenic headache with 100 percent sensitivity and 94 percent specificity in one study of 73 people. No isolated sign performed that way.
How common is cervicogenic headache?
It is the least common of the three headaches that resemble each other. A whole-population examination of 1,838 residents in Norway found 4.1 percent meeting the Study Group criteria. A critical review of the wider literature put the range at 0.4 to 2.5 percent of the general population. Among people already carrying chronic headache, estimates rise to 15 to 20 percent. Tension-type headache runs near 26 percent worldwide and migraine near 14 percent. Active headache of any type reaches 52 percent of the world population.
Does neck pain during a migraine mean the neck is the cause?
No, and the traffic runs in the opposite direction more often than people expect. In a population study of 797 people, neck pain over one year was reported by 76.2 percent of those with pure migraine and by 56.7 percent of people with no headache at all. In animal recordings, stimulating the covering of the brain enlarged the receptive fields of 71 percent of trigeminocervical neurons into cervical territory. A headache can create neck tenderness by itself. One-year neck pain reached 85.7 percent across all primary headaches.
What is the trigeminocervical complex?
It is the region where the lower end of the trigeminal nucleus merges with the dorsal horn of the upper cervical spinal cord. Nociceptive fibers from the C1, C2 and C3 nerves land on the same second order neurons that receive fibers from the first division of the trigeminal nerve. One cell can carry a receptive field on the forehead and another on suboccipital muscle, so the brain has no separate channel by which to tell the two apart. Cells answering to both were recorded directly.
What did the trials of manual therapy for headache find?
They found different answers for different headaches. In 256 adults with chronic cervicogenic headache, 18 sessions of spinal manipulation over six weeks lowered headache days from about 16 to 8 per four weeks. That was about 3 days better than a light massage control, and headache intensity did not improve. In 75 adults with episodic tension-type headache, manipulation added to soft tissue therapy produced no significant difference against a placebo laser on any outcome. The input that moved one headache left the other unchanged.
What does the Unified Model of Tone say about the three headaches?
That they are three organizations of one relay rather than three separate machines. Convergence at the first relay into the central nervous system is the general rule, and the upper cervical region is where it is easiest to demonstrate. From that our model predicts that cervical flexion-rotation range, pressure pain threshold over the upper cervical joints, pericranial tenderness score and recovery time after a sustained-posture load share one underlying factor. That prediction concerns how headache is organized rather than what any treatment does.
12The sources
References
12 primary sources, each linked to its record. Figures quoted on this page were checked against the published abstract.
Related evidence