Radiculopathy
Radiculopathy is dysfunction of a spinal nerve root, most often from disk herniation or degenerative spinal disease, producing radicular pain, dermatomal sensory loss, myotomal weakness, and reduced reflexes in a nerve-root distribution. Diagnosis is clinical; most cases resolve with conservative therapy within 6 to 12 weeks, and imaging is reserved for red flags or persistent symptoms.
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What this article covers
- Overview
Definition: radiculopathy is a disorder of a spinal nerve root producing motor, sensory, and reflex deficits confined to the distribution of that root, typically with radicular pain and dermatomal paresthesia.
- Epidemiology
Lumbar radiculopathy (sciatica) is the more common presentation, related to the high mechanical load borne by the lumbar spine and the frequency of L4-L5 and L5-S1 disk herniation.
- Risk factors
Intervertebral disk herniation, the dominant cause in younger and middle-aged adults, often precipitated by axial loading, twisting, or heavy lifting.
- Pathophysiology
Mechanical compression of the nerve root at the neural foramen, from a herniated disk fragment, osteophyte, or hypertrophied facet/ligamentum flavum, is the most common inciting mechanism.
- Clinical features
Radicular pain is the cardinal symptom, radiating from the spine along the distribution of the affected nerve root (down the leg past the knee for lumbar roots, or from the neck into the arm for…
- Differential diagnosis
Cauda equina syndrome: bilateral radicular symptoms with saddle anesthesia and bowel/bladder dysfunction, versus a single-level unilateral pattern in radiculopathy.
- Diagnosis
Radiculopathy is a clinical diagnosis based on radicular pain plus a myotomal/dermatomal pattern of weakness, sensory loss, and reflex change corresponding to a specific nerve root, reproduced on…
- Management
First step: patient education and activity modification, explaining the expected favorable course, encouraging continued activity as tolerated, and avoiding prolonged bed rest, which delays recovery without added benefit.
- Complications
Persistent or chronic radicular pain despite resolution of the structural lesion, from sustained nerve root sensitization.
- Prognosis
Favorable in most cases: patients with disk-herniation radiculopathy have resolution or near-resolution of symptoms within 6-12 weeks with conservative management alone.
- Prevention
Weight management, regular exercise, and core/paraspinal strengthening lower the risk of disk degeneration and recurrent radiculopathy.
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