Identification of cervical radiculopathies: optimizing the electromyographic screen

Area of Science:

• Neurology
• Electrophysiology
• Musculoskeletal Medicine

Background:

• Cervical radiculopathy diagnosis relies on electrodiagnostic testing.
• Optimizing electromyography (EMG) screening is crucial for efficient patient evaluation.

Purpose of the Study:

• To identify the most effective and concise electromyography (EMG) screening protocol for upper limb cervical radiculopathy.
• To determine the minimum number of muscles required for accurate electrodiagnostic confirmation.

Main Methods:

• A prospective, multicenter study involving 101 patients with confirmed cervical radiculopathy.
• Needle electromyography (EMG) was performed on a standard set of muscles.
• Various muscle screening combinations were evaluated for diagnostic yield.

Main Results:

• Six-muscle EMG screens including paraspinal muscles identified 94%–99% of cervical radiculopathies.
• Five-muscle screens identified 90%–98%, and seven-muscle screens identified 96%–100%.
• Eight distal limb muscles without paraspinals identified 92%–95% of cases.

Conclusions:

• A six-muscle EMG screen incorporating paraspinal muscles offers a high diagnostic rate for cervical radiculopathy.
• Minimal gains in detection rates were observed with additional muscle testing beyond six muscles.