Cervical Canal Stenosis

Spine

Overview

Cervical canal stenosis is a narrowing of the spinal canal in the cervical spine that reduces available space for neural structures, potentially causing myelopathy or radiculopathy. This condition can result from degenerative changes, disc herniation, ligamentous hypertrophy, or osteophyte formation. Clinical presentation ranges from asymptomatic imaging findings to severe neurological deficit requiring surgical intervention.

Pathophysiology

The cervical spinal canal normally measures 17-18mm in diameter. Stenosis develops when structural changes narrow this canal to less than 13mm, compressing the spinal cord (myelopathy) or nerve roots (radiculopathy). Common mechanisms include: disc herniation, facet joint hypertrophy from osteoarthritis, ligamentum flavum thickening, vertebral body osteophytes, and loss of normal cervical lordosis. Chronic compression causes ischemia, demyelination, and neuronal loss, leading to progressive neurological dysfunction if untreated.

Patient Education

Cervical stenosis is a serious condition requiring proper imaging and neurological assessment; conservative management focuses on reducing inflammation and protecting the spinal cord, but progressive neurological symptoms or myelopathy signs warrant urgent specialist referral for consideration of surgical decompression.

Typical Presentation

Site

Central neck pain with possible bilateral arm symptoms, neck, shoulders, upper back, and potentially lower limbs in myelopathic presentations

Quality

Dull aching neck pain, radicular pain described as sharp, burning, or electric-like in arms; myelopathic symptoms include heaviness, clumsiness, or stiffness in hands or legs

Intensity

Mild to severe; depends on degree of stenosis and presence of myelopathy; pain 3-8/10 with variable neurological symptoms

Aggravating

Neck extension and rotation toward stenotic side, sustained upright postures, activities requiring fine motor control of hands, prolonged sitting or standing, cervical extension loading

Relieving

Neck flexion, recumbency, collar support, rest, heat application, anti-inflammatory medication

Associated

Reduced neck range of motion (especially extension), weakness or clumsiness in hands, loss of fine motor coordination, gait disturbance if myelopathic, hyperreflexia, positive Lhermitte's sign, possible bowel/bladder changes in severe myelopathy

Orthopaedic Tests

Test descriptions are written with AI assistance from standard clinical texts. Where a test lists Sources, its description has been checked against them; those sources are independent and do not endorse OsteoKit. Accuracy figures and grades (A–D) appear only when checked against the published study; tests without one are marked “No accuracy study”.

Further reading: full test procedures are described in standard clinical examination texts, e.g. Magee & Manske, Orthopedic Physical Assessment (7th ed.), and Cook & Hegedus, Orthopedic Physical Examination Tests: An Evidence-Based Approach (2nd ed.).

Grade B
A+ABCDGood clinical value: meaningfully changes the diagnosis in one direction (LR 5–10 or 0.1–0.2)
best for ruling OUT (screening).

Upper Limb Neurodynamic Test (ULNT) / Median Nerve Bias

Procedure

Patient supine. With the shoulder girdle held down, abduct and externally rotate the shoulder, supinate the forearm, extend the wrist and fingers and then the elbow. Add neck side-flexion away from and towards the test side.

Positive Finding

Reproduction of the familiar arm symptoms that changes with neck side-flexion and differs from the other side.

Sensitivity / Specificity

97%/22%

Reference: Wainner RS et al., Spine 2003; PMID 12544957

Interpretation

A negative test makes cervical radiculopathy less likely. A positive test supports nerve irritability but does not assess the spinal cord. Note: these figures derive from cervical radiculopathy populations (Wainner 2003); in canal stenosis this test screens for coexisting nerve-root involvement rather than the condition itself.

Sources

Grade C
A+ABCDModest value: a small but usable shift in probability (LR 2–5 or 0.2–0.5)
modest, supportive value.

Spurling Test (Cervical Compression Test)

Procedure

Patient seated. Extend the neck and side-bend it towards the painful side, then apply gentle downward pressure through the head. Stop if symptoms are severe.

Positive Finding

Reproduction of the familiar radiating arm pain or tingling on the tested side.

Sensitivity / Specificity

50%/86%

Reference: Wainner RS et al., Spine 2003; PMID 12544957

Interpretation

A test for nerve-root irritation in the foramen, which often accompanies canal stenosis. It does not test the spinal cord. Avoid repeated or forceful extension if myelopathy is suspected. Note: these figures derive from cervical radiculopathy populations (Wainner 2003); in canal stenosis this test screens for coexisting nerve-root involvement rather than the condition itself.

Sources

Grade C
A+ABCDModest value: a small but usable shift in probability (LR 2–5 or 0.2–0.5)
modest, supportive value.

Neck Distraction Test

Procedure

Patient supine. Cradle the occiput and chin and apply a gentle, gradually increasing lift along the line of the spine for a few seconds.

Positive Finding

Relief or reduction of the familiar arm pain or tingling while the neck is lifted.

Sensitivity / Specificity

44%/90%

Reference: Wainner RS et al., Spine 2003; PMID 12544957

Interpretation

Relief supports nerve-root compression in the foramen. It does not assess the central canal or the spinal cord. Note: these figures derive from cervical radiculopathy populations (Wainner 2003); in canal stenosis this test screens for coexisting nerve-root involvement rather than the condition itself.

Sources

Grade D
A+ABCDLimited value: little effect on the diagnosis on its own
limited standalone value (graded conservatively from a reported range).

Hoffman Sign

Procedure

Hold the patient's relaxed middle finger and flick the nail downwards. Test both hands.

Positive Finding

Reflex flexion of the thumb and index finger, especially if on one side only.

Sensitivity / Specificity

58–62%/50–86%

Reference: Jiang Z et al., Global Spine J 2024; PMID 37903098

Interpretation

An upper motor neuron sign that supports spinal cord compression. In canal stenosis, a positive sign together with other myelopathy signs (clumsy hands, unsteady gait, brisk reflexes) needs prompt medical referral for MRI. Its absence does not exclude myelopathy.

Sources

No accuracy study

Lhermitte Sign

Procedure

Patient seated. Ask the patient to bend the head forward, or flex the neck gently, and report any unusual sensations.

Positive Finding

A brief electric-shock sensation running down the spine or into the limbs on neck flexion.

Interpretation

Points to spinal cord irritation. In canal stenosis a positive sign raises concern for myelopathy and needs medical referral for MRI. It is often absent, so a negative sign does not exclude cord compression.

Sources

⚠ Red Flags

  • •Progressive myelopathy with weakness, spasticity, or ataxia
  • •Lhermitte's sign: electric shock sensation on neck flexion suggesting cord involvement
  • •Loss of bladder or bowel control
  • •Severe progressive neurological deficit
  • •Gait disturbance or lower limb weakness
  • •Upper motor neuron signs including hyperreflexia, clonus, or positive Babinski

⚡ Yellow Flags

  • •Catastrophising about disease progression and paralysis
  • •Persistent high fear-avoidance beliefs limiting function
  • •Belief that neck movement will cause permanent damage
  • •Severe anxiety about neurological complications
  • •Social isolation due to perceived disability
  • •Difficulty accepting conservative management when clinically appropriate

Osteopathic Techniques

Refer first

This condition needs medical assessment and management first. Do not use neck-directed manual techniques. Any osteopathic care is supportive, away from the injured area, and only once the treating team has cleared it. First-line care is physical therapy and medication; rapidly worsening neurological signs need urgent surgical review.

Rehabilitation Exercises

Gentle Cervical Flexion

Range of MotionBeginner

Cervical Lateral Flexion (Away from Stenosis)

Range of MotionBeginner

Levator Scapulae Stretch

StretchingBeginner

Upper Trapezius Stretch

StretchingBeginner

Scalene Muscle Stretch

StretchingIntermediate

Deep Cervical Flexor Activation (Supine Chin Tuck)

StrengtheningBeginner

Cervical Stabilisation Isometric Holds

StrengtheningIntermediate

Scapular Stabilisation (Prone Y-T-W)

StrengtheningIntermediate

Thoracic Extension Mobilisation (Foam Roller)

PosturalIntermediate

Sitting Posture Correction with Neutral Cervical Lordosis

PosturalBeginner

Proprioceptive Neck Retraining (Head Position Awareness)

BalanceIntermediate

Gentle Walking Programme (Posture-Controlled)

CardiovascularBeginner

Referral Criteria

  • •Imaging evidence of cervical stenosis with progressive myelopathic symptoms
  • •Lhermitte's sign or upper motor neuron signs (hyperreflexia, clonus, positive Babinski)
  • •Loss of bladder or bowel control
  • •Progressive weakness in hands or lower limbs despite conservative management
  • •Gait disturbance or significant balance impairment
  • •Failure to improve after 6-8 weeks of conservative management
  • •Acute neurological deterioration
  • •Suspicion of spinal cord infarction or myelitis
  • •Consideration for surgical decompression (refer to neurosurgeon or spine specialist)
  • •Imaging showing severe stenosis (canal diameter <10mm) regardless of symptoms
  • •Presence of significant comorbidities affecting surgical candidacy requiring specialist evaluation