Electromyography (EMG) and Nerve Conduction Studies (NCS) are tests that evaluate the electrical activity within your muscles and nerves. It’s extremely helpful in determining the cause of your pain and creating an ideal pain-relief plan for you. Frank Y. Wei, M.D., PLLC in the greater Minneapolis area in Edina, is a physical medicine and rehabilitation clinic that offers patients full-scale care, from testing and electrodiagnostic medicine to cutting-edge nonsurgical solutions. Call the office or use the online booking tool for help now.
EMG is a test that checks your muscle response to a nerve's activating signals. Dr. Wei often uses this kind of test to diagnose neuromuscular problems. He frequently uses an EMG test and a nerve conduction study (NCS) together to find both muscle and nerve issues.
If you're experiencing muscle weakness or symptoms like tingling and numbness that aren’t related to any known current medical condition, you may need an EMG and a NCS to find the underlying issue. While an EMG focuses on your muscles, a NCS looks at your nerves.
Muscle and nerve disorders can sometimes be hard to differentiate, so an EMG and a NCS are particularly valuable in that they show whether the issue is inside your muscle or is caused by a nerve disorder.
If you have suspected muscle problems such as severe muscle inflammation, muscular dystrophy, myasthenia gravis, or nerve problems like neuropathy, carpal tunnel syndrome, or sciatica, an EMG and a NCS may be a crucial part in making that diagnosis.
During the EMG test, Dr. Wei inserts a very fine needle into several muscles in your arm or leg. These needles detect electrical activity inside your muscle and then display it in visual and audible form. Dr. Wei will ask you to move the muscle during the test to see if your muscles and nerves are working properly.
If you're having a NCS test at the same time, you'll also have surface electrodes — small patches that Dr. Wei positions on your skin atop the nerve. He will stimulate the nerve being tested with a mild electrical current, using the surface electrodes to record your nerve response. Each nerve is tested separately.
It's not unusual to have some muscle soreness at the site of the needle insertion. This usually lasts only for a day or so. Dr. Wei may advise you to take the rest of the day off, but in general there's no downtime after an EMG and NCS. If you experience sudden changes at the needle insertion sites, like severe pain, swelling, or discharge, call the office promptly for guidance.
Most patients have uncomplicated EMG and NCS testing that sets the stage for optimal treatment and long-term symptom relief .
Call Frank Y. Wei, M.D., PLLC, or book using the online appointment maker.