Electrodiagnostic testing is used to evaluate muscle and nerve function in the setting of numbness, pain, or weakness. Electrodiagnostic testing typically includes electromyography (EMG) and nerve conduction velocity (NCV) testing. During EMG testing, a tiny needle (pin electrode) is inserted into muscles and the electrical activity of the muscle is recorded by a computer to evaluate for any abnormal muscle or nerve activity. During NCV testing, electrodes are taped to the skin and a computer delivers a small electrical impulse to test a nerve's speed and strength which may be abnormal in the setting of nerve injury, impingement, or disease.

Diagnoses that may be referred for electrodiagnostic testing include: carpal tunnel syndrome, peripheral neuropathy, diabetic neuropathy, cervical radiculopathy, lumbosacral radiculopathy, sciatica, plexopathy, or nerve injury from trauma or fractures. Electrodiagnostic testing is performed in the Changi General Hospital Clinical Measurement Unit (CMU).