Is motor weakness in cervical radiculopathy an indication for surgery? Analysis of risk factors for poor recovery

Why This Matters

Motor weakness in cervical radiculopathy often raises concern for early surgical intervention. However, the natural history is not always well understood. This study helps clarify which patients are likely to recover with conservative care—and which may require closer monitoring or escalation.p is clinically important.

What the Research Found

This study followed 52 patients with cervical radiculopathy and motor weakness, all initially treated conservatively. Recovery was defined as achieving near-normal strength (mMRC ≥ 4).

For clarity, the modified Medical Research Council (mMRC) scale defines severe weakness as:

    • Grade 0: No contraction
    • Grade 1: Flicker of contraction, no movement
    • Grade 2: Movement possible only with gravity eliminated

Key Findings:

    • Approximately 73% of patients (≈3 out of 4) recovered functional strength within 2–3 months
    • 27% did not fully recover
    • Risk factors for poor recovery included:
      • Age ≥ 59 years
      • Initial mMRC ≤ 2 (more severe weakness)
      • < 2-point improvement in arm pain at 2 months
    • Improvement in arm pain was a strong predictor of neurologic recovery
    • Older patients and those with more severe deficits had lower recovery rates

Clinical Takeaways

    • Recognize that approximately 3 out of 4 patients with motor weakness improve with conservative care within 2–3 months
    • Be aware that severe initial weakness (mMRC ≤ 2) signals higher risk of incomplete recovery
    • Consider that lack of early pain improvement (<2-point change by 2 months) may indicate poorer neurologic recovery
    • Reassess motor function closely during the first 2–3 months, as this is the key recovery window

Where Collaborative Spine Care May Support This

Manual medicine and conservative spine care approaches may play a role in early management of cervical radiculopathy, with careful monitoring of neurologic function. Close follow-up allows providers to identify patients who are improving appropriately versus those who may require further evaluation or surgical consultation.

Reference

Kwon K, Park S, Song MG, et al. Is motor weakness in cervical radiculopathy an indication for surgery? Analysis of risk factors for poor recovery. Eur Spine J. 2025.
DOI: http://dx.doi.org/10.1007/s00586-025-09677-0
PubMed: https://pubmed.ncbi.nlm.nih.gov/41452372/