Radiculopathy

Radiculopathy refers to a set of symptoms caused by compression, irritation, or injury to a spinal nerve root. When a nerve root is compressed or inflamed, it can produce pain, numbness, tingling, or weakness along the distribution of that specific nerve.

Radiculopathy is not a diagnosis in itself—it is a symptom pattern that indicates nerve root involvement. The underlying cause must be identified through clinical evaluation and imaging.

Common causes of radiculopathy include:

• Disc herniation: Displaced disc material compressing the nerve root
• Spinal stenosis: Narrowing of the nerve root passage (lateral recess or foramen)
• Bone spurs (osteophytes): Arthritic changes that encroach on nerve root space
• Spondylolisthesis: Vertebral slippage that compresses nerve roots
• Foraminal stenosis: Narrowing of the opening through which the nerve exits the spine

Radiculopathy can occur in the cervical (neck) or lumbar (lower back) regions. Cervical radiculopathy causes arm symptoms. Lumbar radiculopathy causes leg symptoms.

Each nerve root supplies a specific area of the leg or arm and controls certain muscles. The pattern of symptoms can often identify which nerve is being affected.

Lumbar nerve roots (lower back)

• L4: pain may radiate to the front of the thigh and shin, sometimes with weakness when straightening the leg (quadriceps)
• L5: pain often travels down the outside of the leg and calf to the top of the foot, sometimes with weakness lifting the foot or toes
• S1: pain typically radiates down the back of the leg to the sole or outer part of the foot, sometimes with weakness when pushing off while walking

Cervical nerve roots (neck)

• C6: pain/numbness down the arm to the thumb and index finger; weakness with wrist extension
• C7: pain/numbness down the arm to the middle finger; weakness with triceps and grip strength

In addition to symptom patterns, the clinical examination — including strength, sensation, and reflex testing — helps confirm which nerve root is involved.

Radiculopathy produces symptoms along the path of the affected nerve. The specific symptom distribution depends on which nerve root is compressed.

Lumbar radiculopathy (lower back) may cause:

• Sharp, radiating leg pain following a specific nerve distribution—often described as shooting, burning, or electric
• Numbness or tingling in the leg, foot, or toes
• Weakness in specific muscle groups (such as difficulty lifting the foot, standing on toes, or extending the knee)
• Symptoms typically affect one leg more than the other
• Pain often worsens with sitting, bending, coughing, or sneezing

Common distributions:

• L5 radiculopathy: Pain/numbness down the side of the leg to the top of the foot and big toe; weakness with foot lifting
• S1 radiculopathy: Pain/numbness down the back of the leg to the heel and little toe; weakness with standing on toes

Cervical radiculopathy (neck) may cause:

• Sharp, radiating arm pain following a specific nerve distribution—often described as shooting or burning
• Numbness or tingling in the arm, hand, or specific fingers
• Weakness in specific muscle groups (such as difficulty gripping, lifting the arm, or extending the wrist)
• Neck pain or stiffness (though arm symptoms are typically more prominent)
• Symptoms typically affect one arm

Common distributions:

• C6 radiculopathy: Pain/numbness down the arm to the thumb and index finger; weakness with wrist extension
• C7 radiculopathy: Pain/numbness down the arm to the middle finger; weakness with triceps and grip strength

The majority of patients with radiculopathy respond well to conservative management. Surgery is not indicated in the following situations:

Surgery for radiculopathy is considered when conservative management has been appropriately attempted and specific clinical criteria are met.

Surgical consultation may be appropriate when:

The treatment of radiculopathy at CSI follows a structured, evidence-based approach.

Initial Assessment

Comprehensive evaluation to:

• Establish the diagnosis and identify the affected nerve root
• Correlate imaging findings with the clinical symptom distribution and neurological examination
• Identify the underlying cause of nerve compression (disc herniation, stenosis, bone spur, etc.)
• Determine whether conservative care or surgical consultation is the appropriate initial pathway

Investigations

Diagnosis is based primarily on clinical evaluation, with imaging used to confirm the underlying cause:

• MRI: identifies nerve root compression and its cause (e.g., disc herniation, stenosis)
• CT scan: used in selected cases
• X-rays: may help assess alignment or instability
• EMG (electromyography): may be used to evaluate nerve function, confirm which nerve root is affected, and assess the extent of nerve involvement

EMG can also help distinguish between active nerve irritation or injury (ongoing denervation) and more chronic changes, which may be important in guiding treatment decisions.

Interventional Treatments

• Epidural steroid injections
• Targeted nerve root injections

For most patients, conservative care is initiated and may include:

If symptoms do not improve adequately with conservative care, reassessment determines:

• Whether continued conservative management with modifications is appropriate
• Whether additional diagnostic studies (such as EMG/nerve conduction studies) are needed to confirm nerve involvement
• Whether surgical consultation is warranted based on symptom severity, functional impact, and objective findings

When surgery is appropriate, CSI provides targeted decompression procedures including:

The specific technique is chosen based on the location and cause of nerve compression, the patient's anatomy, and the presence of any associated pathology.

Following surgery, patients work with CSI Physio to:

• Restore mobility and strength
• Progress activity levels safely
• Address underlying movement patterns that may have contributed to nerve compression
• Support long-term spine health and reduce the risk of recurrence

Radiculopathy varies widely in presentation, severity, and underlying cause. Management must be individualized based on the patient's specific symptom distribution, neurological findings, imaging characteristics, and response to conservative care.

CSI's approach prioritizes accurate diagnosis, appropriate conservative management, and selective surgical intervention when clearly indicated.

If you have been diagnosed with radiculopathy or are experiencing radiating arm or leg pain, we welcome the opportunity to provide a comprehensive evaluation.