Why effective chiropractic care requires looking beyond the location of pain to understand the interconnected relationships among the spine, nerves, muscles, and shoulder.
Shoulder pain is one of the most common musculoskeletal complaints, affecting people across all ages and activity levels. Whether it develops following an injury, prolonged desk work, repetitive overhead activity, or athletic training, the discomfort is often assumed to originate from the shoulder itself.
But what if the shoulder isn't actually the source of the problem?
The cervical spine and shoulder share an intricate relationship involving overlapping nerve pathways, muscular attachments, joint mechanics, and coordinated movement. Dysfunction in one region can produce symptoms in the other, making it difficult to identify the true source of pain without a comprehensive examination.
In some cases, shoulder pain originates from cervical nerve irritation or referred pain from spinal structures. In others, shoulder conditions such as rotator cuff injuries or acromioclavicular joint disorders produce symptoms extending into the neck. Some patients have conditions affecting both regions simultaneously.
A systematic review by Katsuura and colleagues, published in Global Spine Journal, examined 76 studies investigating these relationships. The researchers identified three clinically important patterns: overlapping, masquerading, and potentially causative relationships between cervical spine and shoulder pathology. [1]
Understanding these distinctions can help explain why treatments directed exclusively at the painful area sometimes provide incomplete or temporary relief.
Three Ways the Neck and Shoulder Can Influence Each Other
The relationship between cervical spine and shoulder dysfunction extends beyond simply having two painful regions.
Researchers distinguish three important clinical presentations.
1. Overlapping Pathology: When Both Regions Contribute
Overlapping pathology occurs when cervical spine and shoulder conditions exist simultaneously.
For example, someone may have age-related cervical degenerative changes alongside rotator cuff tendinopathy. Both conditions may contribute to discomfort, weakness, and limitations during everyday activities.
Overlapping symptoms create a clinical challenge because the presence of one disorder does not exclude another.
Treating only the shoulder may leave cervical neurological symptoms unresolved. Conversely, addressing the cervical spine may not restore function when significant shoulder pathology remains.
A comprehensive assessment must therefore evaluate both regions rather than assuming all symptoms arise from a single diagnosis.
2. Masquerading Pathology: When Pain Originates Somewhere Else
Masquerading pathology describes a condition in one anatomical region producing symptoms that resemble a disorder in another.
For example, cervical nerve root irritation can produce pain around the shoulder blade, upper arm, or shoulder joint despite the absence of significant local shoulder pathology.
Similarly, certain shoulder disorders can produce referred pain into the neck or trapezius region.
This phenomenon is partly explained by overlapping sensory pathways and the convergence of pain-related signals within the nervous system.
The brain does not always identify the precise anatomical origin of pain, particularly when different tissues share related neurological pathways.
Consequently, the location where pain is experienced does not necessarily identify the structure responsible for producing it.
3. Causative Relationships: When One Region Influences the Other
The third relationship concerns whether dysfunction in one region contributes to the development or persistence of dysfunction in another.
The cervical spine, thoracic spine, scapula, and shoulder form an interconnected mechanical and neuromuscular system.
Changes in muscle function, spinal mobility, scapular positioning, or neurological signaling may influence how forces are distributed during arm movement.
For example, cervical nerve root dysfunction can affect the muscles responsible for shoulder movement and stabilization.
Likewise, altered scapular mechanics may influence muscular demands placed on the cervical region.
Although these relationships are biomechanically plausible and supported by some observational research, demonstrating that one condition directly causes another remains challenging.
This distinction matters because clinical treatment should address demonstrated impairments without assuming that every postural difference or movement asymmetry represents the underlying cause of an injury.
Why Cervical Spine Disorders Can Produce Shoulder Pain
The cervical spine contains seven vertebrae that support the head, permit movement, and protect neurological structures.
Spinal nerve roots emerging from the cervical region contribute to the peripheral nerves supplying the shoulders and upper extremities.
In particular, the C5 and C6 nerve roots contribute significantly to the neurological supply of muscles involved in shoulder movement.
The suprascapular nerve, originating primarily from C5 and C6, provides motor innervation to the supraspinatus and infraspinatus muscles, while the axillary nerve supplies the deltoid and teres minor.
Consequently, neurological dysfunction involving the cervical nerve roots or peripheral nerves may affect shoulder strength, sensation, and motor control.
Cervical conditions such as disc herniation, foraminal stenosis, and degenerative changes can sometimes irritate or compress nerve roots, producing a clinical condition known as cervical radiculopathy.
Symptoms may include radiating arm pain, tingling, numbness, muscle weakness, or altered reflexes.
However, not all neck-related shoulder pain involves a compressed nerve.
Cervical facet joints, intervertebral discs, and surrounding musculoskeletal tissues can also produce referred pain through nociceptive mechanisms.
The Katsuura systematic review identified evidence that stimulation of cervical structures between approximately C3 and C7 can reproduce pain in the posterior shoulder and scapular region. [1]
This helps explain why a patient may experience significant shoulder discomfort despite relatively unremarkable local shoulder findings.
Can Shoulder Problems Also Cause Neck Pain?
The relationship works in both directions.
The shoulder girdle is connected to the cervical and thoracic spine through several muscles, including the trapezius, levator scapulae, rhomboids, and other stabilizing structures.
These muscles contribute to coordinated movement of the scapula and upper extremity while also influencing forces acting on the neck.
Shoulder injuries or persistent movement limitations may change how these muscles are recruited during everyday activities.
For example, a patient with a painful rotator cuff condition may compensate by elevating the shoulder, reducing arm movement, or relying more heavily on cervical and upper trapezius musculature.
Over time, these adaptations may contribute to additional musculoskeletal discomfort.
The Katsuura review also identified studies demonstrating that certain shoulder disorders can refer pain toward the lateral neck and trapezius.
In some reported cases, treating the primary shoulder condition improved symptoms that had initially appeared to originate in the cervical spine.
This reinforces an important principle of musculoskeletal assessment:
Pain in the neck does not always originate from the neck, just as pain in the shoulder does not always originate from the shoulder.
The Spine–Scapula–Shoulder Connection
One of the most important concepts in movement science is that the shoulder does not function independently of the spine.
The scapula, commonly called the shoulder blade, provides a dynamic foundation for movement of the upper extremity.
During arm elevation, the scapula must coordinate with the humerus, clavicle, and thoracic spine.
This relationship is often described as scapulohumeral rhythm.
Efficient shoulder movement requires coordinated contributions from multiple muscles, including the serratus anterior, trapezius, and rotator cuff.
Cervical and thoracic mobility may influence the positions and movement strategies available to the shoulder girdle.
When these relationships become altered, patients may experience changes in movement efficiency, muscular loading, or symptom behavior.
What Is Scapular Dyskinesis?
Scapular dyskinesis describes an alteration in the position or movement of the scapula during shoulder activity.
It may involve differences in upward rotation, posterior tilt, internal rotation, or coordination with the humerus.
Importantly, scapular dyskinesis is a movement finding rather than a standalone diagnosis.
Not every variation in scapular movement is pathological, and not everyone with altered scapular mechanics experiences pain.
Nevertheless, these findings can provide useful information when evaluating individuals with persistent neck or shoulder symptoms.
A 2025 systematic review in BMC Musculoskeletal Disorders examined 19 studies involving 1,365 participants and found an association between chronic neck pain and scapular dyskinesis. [2]
However, the researchers rated the overall certainty of evidence as very low and emphasized that further longitudinal studies are needed to clarify causal relationships.
The findings support considering scapular function during cervical assessments, but they do not establish that correcting scapular position will necessarily resolve neck pain.
Why Posture Alone Doesn't Explain Everything
Posture is frequently discussed in relation to neck and shoulder pain.
Forward head posture, rounded shoulders, and increased thoracic kyphosis are often described as mechanical contributors to musculoskeletal dysfunction.
While these positions can alter joint mechanics and muscular demands, the relationship between posture and pain is not straightforward.
Individuals can demonstrate substantial postural variation without experiencing symptoms.
Likewise, someone with apparently favorable posture may develop persistent neck or shoulder pain.
The Katsuura review identified research suggesting that spinal alignment and thoracic position influence scapular mechanics and muscular performance. However, much of the evidence regarding long-term causation was observational and subject to methodological limitations.
Rather than assuming there is one universally correct posture, a more useful approach evaluates how an individual moves, tolerates physical demands, and adapts to different positions.
Relevant considerations include joint mobility, muscular strength, movement variability, workload, tissue capacity, and symptom response.
Our goal should not be to force every patient into an idealized posture, but to improve their ability to move efficiently, tolerate activity, and maintain physical function across a variety of positions.
How Do We Determine Whether Pain Comes From the Neck or Shoulder?
Distinguishing cervical spine pathology from shoulder pathology requires a systematic clinical examination.
The Katsuura review emphasizes that history and physical examination are particularly important because imaging abnormalities can occur in individuals without symptoms.
A cervical MRI may reveal degenerative changes that are not responsible for someone's shoulder pain.
Similarly, shoulder imaging may identify structural abnormalities that are not the primary cause of the patient's current symptoms.
Therefore, imaging findings must be interpreted alongside the patient's clinical presentation.
Cervical Spine Examination
A cervical assessment may involve evaluating neck mobility, symptom reproduction, neurological function, muscle strength, sensation, and reflexes.
When cervical radiculopathy is suspected, clinicians may use tests such as Spurling's test, upper-limb neurodynamic testing, and the shoulder abduction relief test.
The arm squeeze test may also provide useful information in selected patients.
A 2026 systematic review and meta-analysis published in BMC Musculoskeletal Disorders evaluated the diagnostic accuracy of physical examination tests for cervical radiculopathy. [3]
The researchers found that Spurling's test and combinations of upper-limb neurodynamic tests may assist clinical reasoning.
However, the certainty of evidence was generally very low, and the authors cautioned against interpreting any individual test as definitive.
These tests are most useful when considered alongside the patient's history and neurological examination.
Shoulder Examination
A comprehensive shoulder examination may include assessment of active and passive range of motion, rotator cuff strength, shoulder stability, and symptom-provoking movements.
Specific examination procedures may help investigate rotator cuff pathology, glenohumeral joint disorders, acromioclavicular conditions, and other potential sources of discomfort.
For example, pain associated with certain overhead movements may increase suspicion of a shoulder-related disorder, while symptoms extending beyond the elbow with associated neurological findings may raise concern for cervical nerve involvement.
However, neither symptom pattern should be interpreted in isolation.
Neurological Examination
A neurological examination is particularly important when patients report radiating pain, numbness, tingling, unexplained weakness, or changes in hand coordination.
A 2025 scoping review published in BMC Musculoskeletal Disorders examined the role of neurological examination in identifying cervical radiculopathy. [4]
The authors emphasized that neurological findings—including strength, sensation, and reflex changes—remain clinically important, although evidence concerning the diagnostic accuracy of individual examination components is incomplete.
Progressive neurological deficits or signs suggesting spinal cord dysfunction warrant further medical investigation.
Why Chiropractic Care Should Assess Both Regions
A comprehensive chiropractic examination should not be limited to the anatomical location where a patient reports pain.
Instead, clinical reasoning should consider whether symptoms arise from local joint or soft-tissue dysfunction, neurological involvement, referred pain, or several interacting conditions.
For someone presenting with persistent shoulder discomfort, this may require evaluation of cervical mobility, neurological function, thoracic spine movement, scapular coordination, and local shoulder structures.
Likewise, patients experiencing neck pain may benefit from assessment of shoulder strength, scapular function, and repetitive movement demands.
This approach allows care to be directed toward clinically relevant impairments rather than assuming that all symptoms result from a single spinal or shoulder abnormality.
At Arete Health, we emphasize the integration of chiropractic assessment, physiotherapy, functional movement screening, and individualized exercise prescription.
When indicated, this may involve evaluating joint mobility, muscular capacity, cervical neurological function, scapulothoracic coordination, and the demands associated with work, recreation, or athletic performance.
The goal is to identify which findings are clinically meaningful and develop interventions appropriate to the individual.
Why Treatment Should Address More Than Pain
Pain reduction is an important treatment goal, but it does not necessarily mean that all contributors to a musculoskeletal problem have been addressed.
For example, a patient may experience reduced shoulder pain while continuing to demonstrate limitations in mobility, strength, movement coordination, or tolerance for overhead activity.
Conversely, improving movement quality does not guarantee that a structural shoulder injury or cervical nerve disorder has resolved.
A comprehensive rehabilitation plan may therefore address multiple outcomes, including symptom severity, mobility, strength, physical function, and return to meaningful activities.
Depending on the clinical presentation, treatment may incorporate chiropractic manual therapy, therapeutic exercise, shoulder rehabilitation, cervical strengthening, and individualized movement education.
The Role of Scapular Rehabilitation
A 2024 systematic review and meta-analysis published in BMC Musculoskeletal Disorders evaluated scapular-focused interventions for chronic neck pain across eight randomized controlled trials involving 313 participants. [5]
The researchers identified improvements in pain intensity associated with scapular interventions.
However, they did not demonstrate consistent improvements in neck-related disability or pressure pain thresholds.
This distinction is important.
It suggests that interventions targeting scapular function may benefit selected patients with chronic neck pain, but treatment outcomes should be measured rather than assumed.
A comprehensive rehabilitation program should also consider whether additional cervical, thoracic, neurological, or shoulder-specific interventions are needed.
Why Individualized Exercise Prescription Matters
When persistent neck and shoulder symptoms involve altered movement strategies, reduced strength, or limited physical capacity, individualized exercise prescription can play an important role in rehabilitation.
However, more exercise is not always the immediate answer.
Some patients benefit from temporarily modifying movements that consistently aggravate symptoms while addressing the specific limitations interfering with those activities.
For example, an individual experiencing shoulder discomfort during overhead pressing may require assessment of shoulder mobility, rotator cuff function, scapular coordination, cervical symptoms, and overall training load.
Depending on the findings, the intervention may involve reducing the load, changing the exercise variation, improving movement tolerance, or addressing specific strength or mobility limitations.
As function improves, exercises can be progressively reintroduced according to symptom response and physical capacity.
This approach differs from prescribing the same corrective exercises to everyone with neck or shoulder discomfort.
The objective is to identify what an individual can currently tolerate, address meaningful limitations, and progressively restore the capacity required for their desired activities.
This is particularly valuable for athletes, active adults, occupational populations, and individuals returning to exercise after an injury.
When Should Additional Evaluation Be Considered?
Although many neck and shoulder complaints respond to conservative management, certain findings warrant further investigation.
Progressive muscle weakness, significant sensory loss, changes in walking or balance, deterioration in hand coordination, or new bowel or bladder dysfunction may indicate neurological involvement requiring prompt medical assessment.
Likewise, shoulder pain accompanied by chest discomfort, shortness of breath, or other concerning systemic symptoms requires consideration of potentially serious non-musculoskeletal causes.
When the clinical presentation is unclear or conservative treatment is unsuccessful, additional imaging, electrodiagnostic testing, or referral to an appropriate specialist may be indicated.
The Katsuura review also discusses the role of diagnostic injections in selected cases where cervical and shoulder disorders overlap, particularly when surgical decision-making is being considered.
These procedures are not routinely necessary for every patient and should be performed only when clinically indicated by appropriately qualified professionals.
The Future of Chiropractic Care: Looking Beyond Isolated Joints
The relationship between the cervical spine and shoulder illustrates why musculoskeletal healthcare benefits from a broader perspective.
Pain does not always remain confined to the structure responsible for generating it.
Neurological pathways overlap, muscles coordinate movement across multiple joints, and physical adaptations in one region can influence the demands placed on another.
The systematic review by Katsuura and colleagues provides meaningful evidence that cervical spine and shoulder disorders frequently coexist, mimic one another, and interact through neurological and biomechanical pathways.
Newer research continues to investigate how cervical neurological examination, scapular movement assessment, and targeted rehabilitation may help clinicians differentiate conditions and improve outcomes.
However, understanding anatomical and functional relationships should not lead us to assume that every shoulder problem originates in the neck or that every neck complaint reflects shoulder dysfunction.
Effective care begins with identifying which structures and processes are actually contributing to the individual's presentation.
At Arete Health, our chiropractic philosophy emphasizes comprehensive assessment, individualized treatment, movement restoration, and the integration of neurological and musculoskeletal findings.
We believe the most effective rehabilitation strategies consider not only where pain occurs, but also how the body moves, how different systems interact, and what physical demands the individual hopes to return to.
Because meaningful recovery requires more than treating the painful area. It requires understanding the problem, identifying the appropriate therapeutic targets, and helping patients regain the confidence and physical capacity to move well.
Research References
Katsuura Y, Bruce J, Taylor S, Gullota L, Kim HJ. Overlapping, Masquerading, and Causative Cervical Spine and Shoulder Pathology: A Systematic Review. Global Spine Journal. 2020;10(2):195–208. Published online 2019. https://doi.org/10.1177/2192568218822536
Javdaneh N, Barati A, Shojaedin S, et al. Is chronic neck pain related to scapular dyskinesia? A systematic review. BMC Musculoskeletal Disorders. 2025;26:585. https://doi.org/10.1186/s12891-025-08916-1
Thoomes EJ, et al. Diagnostic accuracy of physical examination tests for painful cervical radiculopathy: update of a systematic review and meta-analysis. BMC Musculoskeletal Disorders. 2026;27:338. https://doi.org/10.1186/s12891-026-09551-0
Neurological examination for cervical radiculopathy: a scoping review. BMC Musculoskeletal Disorders. 2025;26:334. https://doi.org/10.1186/s12891-025-08560-9
Chen Y, Yang C, Nie K, et al. Effects of scapular treatment on chronic neck pain: a systematic review and meta-analysis of randomized controlled trials. BMC Musculoskeletal Disorders. 2024;25:252. https://doi.org/10.1186/s12891-024-07220-8
Makin J, Watson L, Pouliopoulou DV, et al. Effectiveness and safety of manual therapy when compared with oral pain medications in patients with neck pain: a systematic review and meta-analysis. BMC Sports Science, Medicine and Rehabilitation. 2024;16:86. https://doi.org/10.1186/s13102-024-00874-w