EMG/NCV Testing — Objective Evidence of Nerve Damage

What Are EMG and NCV Tests?

Electromyography (EMG) and Nerve Conduction Velocity (NCV) are electrodiagnostic studies measuring electrical activity in nerves and muscles. Unlike pain — which is subjective — EMG/NCV findings are objective: specific, measurable numbers that document nerve damage.

EMG vs. NCV

• NCV: Measures how fast electrical signals travel through a nerve. Damaged nerves conduct more slowly — specific velocity measurements indicate which nerves are affected and how severely.
• EMG: A thin needle electrode inserted into muscle measures electrical activity. Abnormal spontaneous activity (fibrillation potentials, positive sharp waves) indicates nerve injury.

What to Expect

NCV uses small electrodes and mild electrical stimulation — uncomfortable but brief. EMG involves needle insertion into muscles — similar to multiple flu shots. Full study takes 30–60 minutes, reviewed and reported by the performing neurologist.

Legal Value

Insurance companies challenge subjective pain complaints. EMG/NCV data is not subjective — it's measurable and correlatable to specific nerve roots. A finding of reduced nerve conduction at C6-C7 corresponding to your cervical disc herniation is objective evidence that cannot be dismissed as exaggeration.