Clinical Signs of Cervical Myelopathy on Examination
Based on your examination findings of reflexes, hand function, gait, and balance, I can identify whether myelopathy is present by looking for specific pathological patterns that indicate spinal cord dysfunction.
Key Examination Findings That Indicate Myelopathy
Upper Extremity Reflexes
The reflex examination should demonstrate a characteristic pattern 1:
- Hyperreflexia (exaggerated reflexes) in the lower extremities
- Hyporeflexia (diminished reflexes) at the level of cord compression
- Normal reflexes above the level of compression
However, this classic pattern is only present in 26% of patients with confirmed cord signal change on MRI 2, so its absence does not rule out myelopathy.
Pathological Reflexes
Look for these specific abnormal signs 3, 4:
- Hoffman sign - most sensitive pathological reflex, present in 67% of myelopathy cases 2
- Babinski sign (upgoing toe) - indicates upper motor neuron dysfunction
- Ankle clonus - present in 16-25% of cases 2, 4
- Inverted radial reflex - present in 57% of cases 4
The Hoffman sign is the most reliable pathological reflex for detecting myelopathy, though it's still only positive in two-thirds of cases 2.
Hand Function Abnormalities
Specific hand dysfunction patterns include 1, 5:
- Grip weakness - reported in 83% of patients 4
- Loss of fine motor control and hand dexterity
- Numbness in the hands - the patient's perceived location of hand numbness is actually the most useful clinical finding for determining the affected spinal level 5
- The 10-second test (rapid finger tapping) - quantifies hand myelopathy and remains abnormal even in diabetic patients where reflexes may be blunted 6
Gait and Balance Abnormalities
Myelopathic gait changes are common 2, 4:
- Gait abnormality - present in 60% of cases 2
- Instability of gait - reported in 85% of patients 4
- Positive Romberg sign - present in 28-44% of cases 2, 4
- Impaired tandem walk - present in 23% of cases 4
Sensory Findings
- Upper thoracic spinothalamic sensory level - present in 83% of cases 4
- Paresthesias - present in 80% of patients 4
- Sensory loss correlates strongly with myelopathy presence (odds ratio 16.9) 3
Critical Clinical Correlation
The presence of radiographic cord compression on MRI strongly correlates with clinical myelopathy - 84% of patients with cord compression have myelopathic findings on examination, while NO patients without cord compression demonstrate myelopathy 3. Additionally, hyperintense T2 signal within the spinal cord increases the likelihood of clinical myelopathy 11-fold 3.
Common Diagnostic Pitfalls
Relying solely on reflex patterns: The classic reflex pattern (hyporeflexia at level, hyperreflexia below) only occurs in 26% of cases 2
Missing myelopathy in diabetic patients: Deep tendon reflexes are significantly decreased in diabetics with severe neuropathy, but the 10-second hand test and Babinski sign remain reliable 6
Assuming normal imaging means no myelopathy: While cord compression correlates strongly with clinical findings, the neurological examination level matches the MRI level in only 66% of cases 5
Overlooking subtle hand dysfunction: Patient-reported hand numbness location is more accurate than individual reflex tests for level diagnosis 5
Examination Algorithm
To determine if myelopathy is present, systematically assess:
- Pathological reflexes first - Check Hoffman sign bilaterally (most sensitive single finding) 2
- Hand function - Perform 10-second finger tapping test and assess grip strength 6
- Gait assessment - Observe walking pattern and perform tandem gait test 4
- Balance testing - Romberg sign with eyes closed 2, 4
- Sensory examination - Map any sensory level and assess for paresthesias 4
If you have ≥2 long-tract signs (Hoffman, Babinski, clonus, hyperreflexia, or gait dysfunction) localized to the cervical cord, myelopathy is present 3. The combination of multiple findings is more reliable than any single test.