Pain Referral Patterns from Cervical Bone Spurs and Herniated Discs
Pain from cervical bone spurs and herniated discs refers primarily to the neck, upper extremities, interscapular region, trapezius, shoulder, and can extend to the suboccipital area and face, with specific patterns depending on the affected cervical level.
Anatomical Distribution by Cervical Level
The referral patterns follow predictable dermatomal and myotomal distributions based on which cervical nerve root is compressed:
Upper Cervical Levels (C2-C4)
- C2-C3: Pain radiates to the subocciput, neck, and face. This level can also refer to the trapezius, anterior neck, shoulder, interscapular region, and occasionally the upper limb 1, 2
- C3-C4: Produces pain in the upper posterolateral and posterior cervical region, with referral to the trapezius, shoulder, interscapular area, face, chest, and extremity 1, 2
Mid-Cervical Levels (C4-C6)
- C4-C5: Refers pain to the neck, shoulder, interscapular region, trapezius, and can extend to the extremity, face, chest, and subocciput 1, 2
- C5-C6: Produces pain in the neck, trapezius, interscapular region, with referral to the suprascapular area, anterior neck, chest, face, and suboccipital region 1, 2
Lower Cervical Levels (C6-T1)
- C6-C7: Refers pain to the neck, interscapular region, trapezius, shoulder, extending to the extremity, subocciput, and superior angle of the scapula 1, 2
- C7-T1: Produces neck and mid-scapular/interscapular pain 1, 2
Clinical Presentation Patterns
Cervical radiculopathy characteristically presents as neck and/or upper limb pain with or without sensory or motor deficits 3. The compression can arise from:
- Soft disc herniation (acute disc material)
- Hard disc (chronic spondylarthrosis including facet joint and uncovertebral joint osteophytes/bone spurs)
- Combined pathology 3
Key Clinical Features
Pain distribution is frequently unilateral but can be bilateral with equal frequency 1. The specific pattern depends on whether the herniation is:
- Median: Compresses the spinal cord centrally, causing myelopathy (central cord syndrome) 4
- Paramedian: Causes unilateral cord compression or radiculopathy depending on spinal canal width 4
- Lateral: Compresses the nerve root at the anterolateral corner, producing pure radiculopathy (88% of radiculopathy cases) 4
Important Clinical Caveats
Diagnostic Pitfalls to Avoid
Do not rely on MRI findings alone - MRI must always be interpreted with clinical findings due to frequent false-positives and false-negatives 3. Asymptomatic patients frequently show disc abnormalities on imaging.
Physical examination has limited accuracy - Systematic reviews show limited evidence for physical examination accuracy in diagnosing cervical radiculopathy compared to imaging or surgical findings 3.
Abnormal imaging levels may not correspond to clinical examination levels - The symptomatic level may differ from the most abnormal-appearing level on imaging 3.
Cervicogenic Headache
Cervical pathology can also produce headache as referred pain from upper cervical structures (muscles, disc space, facet joints, nerve roots), though diagnosis remains challenging due to overlapping symptoms with other headache disorders and high prevalence of abnormal imaging in asymptomatic patients 3.
Prognosis
75-90% of patients achieve symptomatic relief with conservative nonoperative therapy, as cervical radiculopathy is frequently self-limiting 3. However, 30-50% of patients with chronic neck pain develop symptoms lasting more than one year 3.