An electromyography is commonly performed if an examination suggests impaired muscle strength. Results of an electromyogram allow your doctor to determine if your muscle weakness is due to an injury of a nerve attached to the muscle, or if the weakness is caused by an underlying neurological disorder.
Your doctor will request an electromyography testing to be done if your diagnosis suggests peripheral nervous system disorders including carpal tunnel syndrome, peripheral neuropathy, diabetic neuropathy, cervical radiculopathy, lumbosacral radiculopathy, sciatica, plexopathy, or nerve injury from trauma or fractures.