Occiput and Atlas (C0-C1): What This Joint Does

The occiput and atlas form the joint where the skull rests on the spine, and its function is nodding rather than turning. Yes-movements occur here; no-movements occur at the level below. That division is useful clinically, because a restriction in nodding and a restriction in turning point to different levels and call for different work.

The joint sits directly beneath the base of the skull, which is why low-force, non-twisting methods are used at this level and why nothing should be done quickly or without explanation. Headache at the base of the skull reproduced by pressure there is the common finding.

For more information about occiput and atlas, contact the Bukit Damansara (KL) main center: WhatsApp+60 17 269 1873 Call+603 2093 1000

Key Takeaways: Occiput and Atlas (C0-C1)

• C0-C1, the atlanto-occipital joint, mainly allows nodding; most head turning happens at C1-C2.
• Stiffness here is commonly linked with headache at the base of the skull and restricted nodding.
• The joint lies close to the brainstem and vertebral arteries, so assessment comes first and force and end-range twisting are avoided.
• Care at CSC uses gentle mobilization, instrument-assisted adjustment, soft-tissue work and neck exercise, with medical referral when symptoms suggest something other than a joint problem.

Understanding the Occiput and Atlas (C0-C1)

The C0-C1 segment, also called the atlanto-occipital joint, connects the base of the skull (occiput) to the first neck vertebra (atlas). It supports head movement and sits close to important structures, including the brainstem, the upper spinal cord and the vertebral arteries. You can read more about cervical spine anatomy from Cleveland Clinic.

The joint allows a nodding motion of roughly 25 degrees forward and back. It is not designed for forceful twisting or yanking, which is one reason the methods used at this level are gentle.

Occiput and Atlas Assessment at Two KL Centers

An upper-neck assessment covering the occiput, atlas and neighboring joints is available at both centers of Chiropractic Specialty Center. Mention any recent trauma, dizziness, visual changes or new neurological symptoms when you book. Directions are on the Bukit Damansara contact page and the Bandar Sri Damansara contact page.

• Bukit Damansara (KL, main center): Call +603 2093 1000 or WhatsApp +60 17 269 1873 to see the Bukit Damansara / KL center.
• Bandar Sri Damansara (KL): Call +603 6262 5777 or WhatsApp +60 12 455 6939 to see the Bandar Sri Damansara center.

How Common Are Problems at the C0-C1 Junction?

Significant structural problems at C0-C1, such as instability, are uncommon. Congenital variations such as atlanto-occipital assimilation, where the atlas is fused to the skull, occur in roughly 0.14 to 0.75% of people.

Neck pain in general is very common. In 2020, neck pain affected an estimated 203 million people worldwide, with projections of about 269 million by 2050, and women are affected more often than men. Studies in adolescents and young adults also link long periods of looking down at mobile phones with more neck pain.

How C0-C1 Relates to the Rest of Your Neck

C0-C1 is the top of a chain of joints, and when one level is stiff, the levels below often take on more movement. Each level has its own role:

• C1-C2 provides most of the head’s rotation.
• C2-C3 links the upper neck to the middle neck and is a common source of headache.
• C3-C4 helps with side bending and neck posture.
• C4-C5 sits where nerves to the shoulder and diaphragm emerge.
• C5-C6 is one of the most loaded neck levels and a common site of disc wear.
• C6-C7 is linked with grip and hand function.
• C7-T1 joins the neck to the upper back.

C0-C1 and Nearby Nerves

The first cervical nerve (C1) supplies the small suboccipital muscles, and the greater occipital nerve, which carries fibers from C2, runs through the muscles at the back of the upper neck to the scalp. Irritation of the greater occipital nerve can cause occipital neuralgia: sharp, shooting pain from the base of the skull over the back of the head.

Several cranial nerves, including the accessory and hypoglossal nerves, leave the skull close to this region. Symptoms such as facial numbness, swallowing difficulty, visual changes, persistent dizziness or tinnitus should not be assumed to come from the joint; they need appropriate medical, ear, eye or neurological assessment.

Atlanto-Occipital (C0-C1) vs. Atlanto-Axial (C1-C2) Joint Function

The upper neck has two joints with different jobs. C0-C1 mainly allows nodding, about 25 degrees of flexion and 30 degrees of extension, and C1-C2 mainly allows rotation, about 35 to 45 degrees to each side. The two work together, so stiffness at one level changes the load on the other and on the surrounding muscles.

Common Contributors to C0-C1 Problems

• forward head posture from desk or device use
• whiplash and other neck injuries
• jaw (TMJ) problems, which change upper neck muscle activity
• repetitive strain, such as long drives or holding a phone between ear and shoulder
• tight suboccipital or jaw muscles restricting movement

Symptoms Linked With C0-C1 Problems

• headache at the base of the skull
• occipital neuralgia (sharp pain behind the head)
• neck stiffness or restricted nodding
• jaw tension alongside upper neck stiffness

Dizziness, visual disturbances and ear fullness can occur alongside neck problems but have many other causes, so they are assessed carefully rather than attributed to the joint.

The Jaw and Upper Neck

The jaw (TMJ) and upper neck share muscles and movement patterns, and people with TMJ disorders often have reduced upper neck movement. Assessing both helps when headaches, jaw tension and neck stiffness occur together.

Proper Assessment for C0-C1 Problems

Before care begins, the assessment at CSC includes:

• a history of symptoms, injuries and any neurological or vascular warning signs
• examination of the suboccipital muscles and upper neck movement
• checking movement of the atlas and neighboring joints
• arranging imaging when indicated, such as an open-mouth X-ray to view C1, C2 and the dens, or flexion views when instability is suspected

The plan is then built around the findings, and referral is discussed when they point elsewhere.

Risks of Forceful and Rotational Methods

Some techniques marketed for the upper neck involve side-bending and upward thrusts or rapid rotation. Case reports have described vertebral artery dissection and, rarely, stroke after neck manipulation. Large population studies suggest much of this association may reflect people with an early, undiagnosed dissection seeking care for neck pain, but the uncertainty is a good reason to favor gentle methods at this level.

Aggressive Neck Traction Methods: Ring Dinger®, Y-Strap and Towel Jerks

Social media has popularized neck traction maneuvers such as the Ring Dinger®, Y-Strap and towel jerks, which apply a sudden, high-force pull along the spine. They are not part of accredited Doctor of Chiropractic training or licensure examinations, and there is no peer-reviewed evidence supporting their safety or benefit.

Concerns include excessive traction on the neck, overstretching of ligaments and blood vessels, and aggravation of undiagnosed disc or instability problems. CSC does not use these methods.

Gentle, Non-Rotatory C0-C1 Care at CSC

Care avoids twisting, yanking and high-velocity rotation. Depending on the findings, it may combine:

• gentle mobilization of the upper neck joints
• an instrument-assisted chiropractic adjustment, which applies a small impulse without rotation
• physiotherapy methods such as ultrasound, high-intensity laser therapy and soft-tissue release
• neck exercise, including chin tucks, deep neck flexor training and posture work
• jaw muscle work when the TMJ is involved

Exercises and Self-Care (With Professional Approval)

• Small nods: gentle “yes” movements while lying on your back, 5 to 7 times.
• Suboccipital rest: lie with the base of your skull resting on a rolled towel for 2 to 3 minutes.
• Chin tucks: draw the chin straight back without tilting the head.

Stop and seek professional advice if you feel dizzy, have sharp pain or notice any neurological symptoms.

Summary: Methods to Avoid and What to Use Instead

Avoid	Use instead
Occipital lift (“magic hug”) thrusts	Gentle C0-C1 glides and non-rotatory mobilization
Cervical rotation thrusts	Controlled mobilization with stability exercises
DIY neck manipulation	Clinician-guided care and safe home exercises

Planning a visit? You can review the current chiropractic price in Kuala Lumpur and physiotherapy fees in Kuala Lumpur before you come in.

FAQ: Occiput and Atlas (C0-C1)

What are the occiput and atlas?

The occiput is the base of the skull and the atlas (C1) is the first neck vertebra. Together they form the C0-C1 joint, which mainly allows nodding and sits close to the brainstem, upper spinal cord and vertebral arteries.

How can TMJ problems affect the upper neck, and vice versa?

The jaw and upper neck share muscles and movement patterns. People with TMJ disorders often have reduced upper neck movement, and neck stiffness can add to jaw tension, so both are assessed when symptoms overlap.

What symptoms are linked with C0-C1 problems?

Headache at the base of the skull, occipital neuralgia, neck stiffness and restricted nodding are the most typical. Dizziness, visual changes and ear symptoms have many other causes and need careful assessment rather than being assumed to come from the joint.

How does CSC assess occiput and atlas problems?

Assessment starts with a history, including warning signs, and an examination of the suboccipital muscles and upper neck movement. Imaging, such as an open-mouth X-ray, is arranged when it would answer a specific question.

Why does CSC avoid the Ring Dinger®, Y-Strap and towel jerks?

These methods apply sudden, high-force traction to the neck. They are not part of accredited chiropractic training, lack safety evidence, and raise concerns about strain on ligaments and blood vessels. CSC uses gentle, non-rotatory methods instead.

How common are problems at the C0-C1 junction?

Significant structural problems here are uncommon; congenital variations such as atlanto-occipital assimilation occur in fewer than 1 in 100 people. Neck pain overall is very common, affecting more than 200 million people worldwide.

How can problems at C0-C1 affect the rest of the neck?

When C0-C1 is stiff, other levels such as C1-C2 and the mid-neck often move more to compensate, which can add to muscle tension and pain elsewhere in the neck.

References

1. Ho HN, et al. Atlanto-occipital assimilation: a pictorial review. J Clin Imaging Sci. 2024;14:24.
2. Treranan S, Monum T, Prasitwattanaseree S, Mahakkanukrauh P. Morphological analysis of occipital condyle and superior articular facet of first cervical vertebra and its congruence in a Thai population. Anat Cell Biol. 2025;58(2):186-199.
3. Fu F, et al. Temporal trends in neck pain prevalence among adolescents and young adults. Arch Med Sci. 2025;21(2):514-525.
4. Fares J, Fares MY, Fares Y. Musculoskeletal neck pain in children and adolescents: risk factors and complications. Surg Neurol Int. 2017;8:72.
5. Parra-Fernández DM, et al. Mobile phone dependence and musculoskeletal pain prevalence in adolescents: a cross-sectional study. Front Pain Res (Lausanne). 2025;6:1489293.
6. GBD 2021 Neck Pain Collaborators. Global, regional, and national burden of neck pain, 1990-2020, and projections to 2050. Lancet Rheumatol. 2024;6(3):e142-e155.
7. Bogduk N. The anatomy of occipital neuralgia. Clin Exp Neurol. 1981;17:167-184.
8. Dvorak J, Panjabi MM, Novotny JE, Antinnes JA. In vivo flexion/extension of the normal cervical spine. J Orthop Res. 1991;9(6):828-834.
9. Bogduk N, Mercer S. Biomechanics of the cervical spine. I: Normal kinematics. Clin Biomech (Bristol). 2000;15(9):633-648.
10. Hack GD, Koritzer RT, Robinson WL, et al. Anatomic relation between the rectus capitis posterior minor muscle and the dura mater. Spine (Phila Pa 1976). 1995;20(23):2484-2486.
11. Fernández-de-las-Peñas C, Cuadrado ML, Pareja JA. Myofascial trigger points, neck mobility and forward head posture in unilateral migraine. Cephalalgia. 2006;26(9):1061-1070.
12. Grondin F, Hall T, Laurentjoye M, Ella B. Upper cervical range of motion is impaired in patients with temporomandibular disorders. Cranio. 2015;33(2):91-99.
13. Cassidy JD, Boyle E, Côté P, et al. Risk of vertebrobasilar stroke and chiropractic care: results of a population-based case-control and case-crossover study. Spine (Phila Pa 1976). 2008;33(4 Suppl):S176-S183.
14. Whedon JM, Petersen CL, Li Z, et al. Association between cervical artery dissection and spinal manipulative therapy: a Medicare claims analysis. BMC Geriatr. 2022;22(1):917.
15. Oxland TR, Panjabi MM. The onset and progression of spinal injury: a demonstration of neutral zone sensitivity. J Biomech. 1992;25(10):1165-1172.
16. White AA, Panjabi MM. Clinical Biomechanics of the Spine. 2nd ed. Philadelphia: Lippincott; 1990.

These references describe the anatomy, biomechanics and epidemiology of the upper neck and the safety of neck care in general. None of them evaluates a care program at Chiropractic Specialty Center. The journal articles can be checked through their free PubMed records.

The Author of Occiput and Atlas: What This C0-C1 Joint Does

Occiput and Atlas: What This C0-C1 Joint Does was written by Yama Zafer, D.C., a graduate of Cleveland University - Kansas City with 30+ years in chiropractic and physiotherapy.

Readers looking into the skull and atlas joint (C0-C1) often go on to read about the upper neck (C0 to C3) and headaches and migraines. And for the bigger picture, our neck pain guide brings our neck, upper back and arm topics together in one place.

Last Updated: Occiput and Atlas (C0-C1): What This Joint Does

Occiput and Atlas (C0-C1): What This Joint Does was last reviewed and updated on September 25, 2026.